From 0c59aace7159ea77b5d3a6e97a246e98f63ddd0e Mon Sep 17 00:00:00 2001
From: 4gray <4gray@users.noreply.github.com>
Date: Sat, 1 Aug 2026 17:13:16 +0200
Subject: [PATCH] fix(playback): structure MPEG-TS diagnostics (#1327)

* docs(playback): design structured mpegts diagnostics

* docs(playback): plan structured mpegts diagnostics

* fix(playback): structure mpegts error evidence

* fix(playback): structure HTML5 mpegts errors

* fix(playback): share mpegts evidence across players

* fix(playback): render structured mpegts evidence

* docs(playback): document structured mpegts diagnostics

* chore(playback): keep diagnostics lint clean

* docs(playback): complete mpegts diagnostics plan
---
 .../playback-structured-mpegts-diagnostics.md |   9 +
 AGENTS.md                                     |   6 +
 CLAUDE.md                                     |   8 +
 docs/architecture/embedded-inline-playback.md |  26 +-
 ...026-08-01-structured-mpegts-diagnostics.md | 783 ++++++++++++++++++
 ...01-structured-mpegts-diagnostics-design.md | 301 +++++++
 .../art-player-source-session.spec.ts         |  14 +-
 .../art-player/art-player-source-session.ts   |   5 +-
 .../art-player/art-player.component.spec.ts   |  13 +-
 .../html-video-player-diagnostics.ts          |   9 +-
 ....component.shared-controls.sources.spec.ts |  46 +
 ...component.shared-controls.spec-fixtures.ts |  20 +-
 .../mpegts-playback-evidence.model.ts         |  64 ++
 .../mpegts-playback-evidence.util.spec.ts     | 239 ++++++
 .../mpegts-playback-evidence.util.ts          | 167 ++++
 .../playback-diagnostics.model.ts             |  11 +-
 .../playback-diagnostics.util.spec.ts         |  39 +-
 .../playback-diagnostics.util.ts              |  98 +--
 .../playback-error-patterns.util.ts           |  72 --
 .../lib/vjs-player/vjs-mpegts-session.spec.ts |  62 +-
 .../src/lib/vjs-player/vjs-mpegts-session.ts  |   8 +-
 .../web-player-view-diagnostics.utils.ts      |  17 +-
 .../web-player-view.component.spec.ts         |  58 ++
 23 files changed, 1886 insertions(+), 189 deletions(-)
 create mode 100644 .changes/playback-structured-mpegts-diagnostics.md
 create mode 100644 docs/superpowers/plans/2026-08-01-structured-mpegts-diagnostics.md
 create mode 100644 docs/superpowers/specs/2026-08-01-structured-mpegts-diagnostics-design.md
 create mode 100644 libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.model.ts
 create mode 100644 libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.spec.ts
 create mode 100644 libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.ts

diff --git a/.changes/playback-structured-mpegts-diagnostics.md b/.changes/playback-structured-mpegts-diagnostics.md
new file mode 100644
index 000000000..2b445d295
--- /dev/null
+++ b/.changes/playback-structured-mpegts-diagnostics.md
@@ -0,0 +1,9 @@
+---
+type: fix
+area: playback
+issues: [1159]
+---
+
+MPEG-TS playback errors now show exact engine evidence, including HTTP status,
+without exposing provider response details. Format, codec, truncated-stream,
+and MediaSource failures now produce more accurate fallback guidance.
diff --git a/AGENTS.md b/AGENTS.md
index 05878a128..0829e2403 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -218,6 +218,12 @@ Key files:
   preflight stays unknown but keeps external fallback for clear DASH; KODIPROP
   DRM still suppresses it. See the CLAUDE.md "Video Players" feature entry and
   `docs/architecture/m3u-playlist-module.md` ("DASH + ClearKey Playback").
+- mpegts.js `1.8.0` errors from HTML5, Video.js, and ArtPlayer cross one
+  version-locked structured evidence boundary. Only exact public type/detail
+  pairs, pair-derived stage/failure, terminal disposition, and the validated
+  HTTP 4xx/5xx status slot are retained; raw messages and arbitrary `info`
+  never reach diagnostics. This is a sibling of `PlayerController`, not part
+  of the controls contract.
 - The built-in HTML5/hls.js player is the second guarded consumer.
   `HtmlVideoPlayerComponent` provides a component-scoped
   `WebVideoControlsAdapter`; its neutral `web-video-support` bridge is shared
diff --git a/CLAUDE.md b/CLAUDE.md
index a01743a2e..531033b7f 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -723,6 +723,14 @@ app as a real argument, so it is not an option.
 **Video Players**:
 
 - Built-in web players: HTML5+hls.js, Video.js, and ArtPlayer
+- mpegts.js `1.8.0` errors from all three built-in players cross one
+  version-locked structured evidence boundary. It retains only exact public
+  type/detail pairs, pair-derived stage/failure, terminal disposition, and a
+  validated HTTP 4xx/5xx status; raw messages and arbitrary `info` never reach
+  stored or rendered diagnostics. HTTP/network failures avoid false decoder
+  recommendations, while exact format, codec, truncated-stream, and
+  MediaSource failures retain actionable fallback guidance. This diagnostic
+  layer remains separate from the shared `PlayerController` controls contract.
 - DASH + ClearKey (M3U module): `.mpd` channels play through a lazily loaded
   Shaka Player source engine inside the HTML5 and ArtPlayer components (no new
   player in settings). ClearKey keys come from `#KODIPROP:inputstream.adaptive.*`
diff --git a/docs/architecture/embedded-inline-playback.md b/docs/architecture/embedded-inline-playback.md
index 395a7349a..426664fba 100644
--- a/docs/architecture/embedded-inline-playback.md
+++ b/docs/architecture/embedded-inline-playback.md
@@ -432,14 +432,36 @@ configuration.
 
 `network-error` is reserved for provider/network loading failures. Engines that expose concrete browser security evidence, such as CORS, mixed content, Content Security Policy, or private-network-access blocks, use `browser-access-error` so the UI can explain that the browser player was blocked before playback reached decoding.
 
-mpegts.js `Early-EOF` failures on MPEG-TS streams are classified as `media-decode-error` instead of generic `network-error`. These failures usually mean the fetch stream ended before mpegts.js expected a complete transport stream, and external players may still handle the same URL more tolerant of short reads or malformed TS boundaries.
+mpegts.js `1.8.0` errors cross one shared structured boundary before the HTML5,
+Video.js, or ArtPlayer owner emits a diagnostic. Version-locked tests compare
+the installed public `ErrorTypes` and `ErrorDetails` exports with the accepted
+contract. Evidence retains only an exact type/detail pair, terminal
+disposition, a pair-derived stage and failure, and a validated HTTP 4xx/5xx
+status from the top-level `info.code` slot of
+`NetworkError + HttpStatusCodeInvalid`.
+
+Exact public pairs classify HTTP/timeout/exception as network failures,
+`FormatUnsupported` as an unsupported container, `CodecUnsupported` as an
+unsupported codec, and `FormatError`/`MediaMSEError` as media failures.
+`UnrecoverableEarlyEof` remains a fallback-actionable `media-decode-error`:
+mpegts.js has already exhausted its internal finite-source early-EOF recovery,
+and another demuxer may tolerate the truncated transport stream. Mismatched or
+unknown pairs fail closed to `unknown-playback-error`.
+
+Arbitrary `info`, messages, URLs, headers, bodies, credentials, and provider
+objects are neither retained nor rendered. A generic `Exception` does not
+prove CORS, mixed content, CSP, or private-network access, so mpegts.js no
+longer creates `browser-access-error` from message text. HTTP and other network
+failures do not claim an external decoder will fix the provider response;
+container, codec, truncated-stream, format, and MediaSource failures retain
+the existing explicit MPV/VLC fallback behavior.
 
 The diagnostic surface covers the inline player viewport when playback fails,
 with a compact warning badge, a native-player fallback headline, and
 player-card actions for configured external players. It exposes technical
 details on demand: diagnostic code, reporting player/source, detected
 container/MIME, video/audio codecs, native browser error fields, sanitized
-structured Video.js/VHS, HLS, and Shaka evidence, and existing mpegts details. HLS
+structured Video.js/VHS, HLS, Shaka, and mpegts.js evidence. HLS
 manifest codec metadata also drives a concise browser-support hint for codecs
 that Chromium/Electron commonly cannot decode inline, such as HEVC, AC-3,
 E-AC-3, DTS, and MPEG-2 video.
diff --git a/docs/superpowers/plans/2026-08-01-structured-mpegts-diagnostics.md b/docs/superpowers/plans/2026-08-01-structured-mpegts-diagnostics.md
new file mode 100644
index 000000000..b26fc7fbb
--- /dev/null
+++ b/docs/superpowers/plans/2026-08-01-structured-mpegts-diagnostics.md
@@ -0,0 +1,783 @@
+# Structured mpegts.js Diagnostics Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Replace mpegts.js message heuristics with a version-locked,
+allowlisted evidence boundary shared by HTML5, Video.js, and ArtPlayer.
+
+**Architecture:** Normalize only mpegts.js 1.8.0 public error type/detail
+constants and the exact HTTP-status slot into `MpegTsPlaybackEvidence`. The
+shared classifier maps internally consistent evidence to existing diagnostic
+codes, and the existing viewport renders only structured evidence while the
+three engine owners keep their current source and lifecycle behavior.
+
+**Tech Stack:** Angular 21, TypeScript 5.9, mpegts.js 1.8.0, Jest through Nx,
+Markdown architecture and release-note documentation.
+
+---
+
+### Task 0: Confirm The Isolated Baseline And Public Runtime
+
+**Files:**
+
+- Verify: `package.json`
+- Verify: `pnpm-lock.yaml`
+- Verify: `node_modules/mpegts.js/src/player/player-errors.js`
+- Verify: `node_modules/mpegts.js/src/io/loader.js`
+- Verify: `node_modules/mpegts.js/src/core/transmuxing-controller.js`
+- Verify: `node_modules/mpegts.js/d.ts/mpegts.d.ts`
+
+- [x] **Step 1: Create the isolated feature branch from current master**
+
+Run:
+
+```bash
+git switch -c agent/structure-mpegts-diagnostics origin/master
+```
+
+Expected: branch starts at `9f4e11d6d`, the merge of PR #1318.
+
+- [x] **Step 2: Verify dependency and Nx availability**
+
+Run:
+
+```bash
+test -d node_modules
+pnpm nx show projects --withTarget test
+```
+
+Expected: exit 0 and output containing `ui-playback`.
+
+- [x] **Step 3: Run the affected-project baseline**
+
+Run:
+
+```bash
+pnpm nx test ui-playback
+```
+
+Expected: 87 suites and 849 tests pass before implementation.
+
+- [x] **Step 4: Audit the installed public contract**
+
+Confirm:
+
+```text
+mpegts.js version = 1.8.0
+ErrorTypes = NetworkError, MediaError, OtherError
+ErrorDetails = Exception, HttpStatusCodeInvalid, ConnectingTimeout,
+               UnrecoverableEarlyEof, MediaMSEError, FormatError,
+               FormatUnsupported, CodecUnsupported
+HttpStatusCodeInvalid info = { code: HTTP status, msg: status text }
+recoverable EarlyEof is handled internally before the public player error
+```
+
+### Task 1: Drive The Public Evidence Boundary From Failing Tests
+
+**Files:**
+
+- Create:
+  `libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.model.ts`
+- Create:
+  `libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.ts`
+- Create:
+  `libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.spec.ts`
+
+- [x] **Step 1: Write the failing installed-runtime contract test**
+
+Create `mpegts-playback-evidence.util.spec.ts` and assert the real installed
+runtime before using any mocks:
+
+```typescript
+import mpegts from 'mpegts.js';
+import {
+    MpegTsPlaybackEngineDetails,
+    MpegTsPlaybackEngineType,
+} from './mpegts-playback-evidence.model';
+import {
+    MPEGTS_DIAGNOSTIC_VERSION,
+    createMpegTsPlaybackEvidence,
+} from './mpegts-playback-evidence.util';
+
+describe('mpegts.js playback evidence', () => {
+    it('locks the accepted public contract to mpegts.js 1.8.0', () => {
+        expect(mpegts.version).toBe(MPEGTS_DIAGNOSTIC_VERSION);
+        expect(mpegts.ErrorTypes).toEqual({
+            NETWORK_ERROR: MpegTsPlaybackEngineType.Network,
+            MEDIA_ERROR: MpegTsPlaybackEngineType.Media,
+            OTHER_ERROR: MpegTsPlaybackEngineType.Other,
+        });
+        expect(mpegts.ErrorDetails).toEqual({
+            NETWORK_EXCEPTION:
+                MpegTsPlaybackEngineDetails.NetworkException,
+            NETWORK_STATUS_CODE_INVALID:
+                MpegTsPlaybackEngineDetails.HttpStatusCodeInvalid,
+            NETWORK_TIMEOUT:
+                MpegTsPlaybackEngineDetails.ConnectingTimeout,
+            NETWORK_UNRECOVERABLE_EARLY_EOF:
+                MpegTsPlaybackEngineDetails.UnrecoverableEarlyEof,
+            MEDIA_MSE_ERROR: MpegTsPlaybackEngineDetails.MediaMseError,
+            MEDIA_FORMAT_ERROR: MpegTsPlaybackEngineDetails.FormatError,
+            MEDIA_FORMAT_UNSUPPORTED:
+                MpegTsPlaybackEngineDetails.FormatUnsupported,
+            MEDIA_CODEC_UNSUPPORTED:
+                MpegTsPlaybackEngineDetails.CodecUnsupported,
+        });
+    });
+});
+```
+
+Run:
+
+```bash
+NODE_OPTIONS=--experimental-vm-modules node node_modules/jest/bin/jest.js \
+  --config jest.web-esm.workspace.ts --runTestsByPath \
+  libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.spec.ts \
+  --runInBand
+```
+
+Expected: FAIL because the model and evidence modules do not exist.
+
+- [x] **Step 2: Add the focused evidence model**
+
+Create `mpegts-playback-evidence.model.ts` with const-derived unions:
+
+```typescript
+export const MpegTsPlaybackEngineType = {
+    Network: 'NetworkError',
+    Media: 'MediaError',
+    Other: 'OtherError',
+    Unknown: 'unknown',
+} as const;
+
+export type MpegTsPlaybackEngineType =
+    (typeof MpegTsPlaybackEngineType)[keyof typeof MpegTsPlaybackEngineType];
+
+export const MpegTsPlaybackEngineDetails = {
+    NetworkException: 'Exception',
+    HttpStatusCodeInvalid: 'HttpStatusCodeInvalid',
+    ConnectingTimeout: 'ConnectingTimeout',
+    UnrecoverableEarlyEof: 'UnrecoverableEarlyEof',
+    MediaMseError: 'MediaMSEError',
+    FormatError: 'FormatError',
+    FormatUnsupported: 'FormatUnsupported',
+    CodecUnsupported: 'CodecUnsupported',
+    Unknown: 'unknown',
+} as const;
+
+export type MpegTsPlaybackEngineDetails =
+    (typeof MpegTsPlaybackEngineDetails)[keyof typeof MpegTsPlaybackEngineDetails];
+
+export const MpegTsPlaybackDisposition = { Terminal: 'terminal' } as const;
+export type MpegTsPlaybackDisposition =
+    (typeof MpegTsPlaybackDisposition)[keyof typeof MpegTsPlaybackDisposition];
+export const MpegTsPlaybackStage = {
+    Loader: 'loader',
+    Demux: 'demux',
+    MediaSource: 'media-source',
+    Unknown: 'unknown',
+} as const;
+export type MpegTsPlaybackStage =
+    (typeof MpegTsPlaybackStage)[keyof typeof MpegTsPlaybackStage];
+export const MpegTsPlaybackFailure = {
+    Http: 'http',
+    Timeout: 'timeout',
+    Network: 'network',
+    TruncatedStream: 'truncated-stream',
+    Format: 'format',
+    Codec: 'codec',
+    MediaSource: 'media-source',
+    Unknown: 'unknown',
+} as const;
+export type MpegTsPlaybackFailure =
+    (typeof MpegTsPlaybackFailure)[keyof typeof MpegTsPlaybackFailure];
+
+export interface MpegTsPlaybackEvidence {
+    readonly engineType: MpegTsPlaybackEngineType;
+    readonly engineDetails: MpegTsPlaybackEngineDetails;
+    readonly disposition: MpegTsPlaybackDisposition;
+    readonly stage: MpegTsPlaybackStage;
+    readonly failure: MpegTsPlaybackFailure;
+    readonly httpStatus?: number;
+}
+```
+
+Use const-derived aliases for disposition, stage, and failure rather than
+duplicating string unions if TypeScript reports drift.
+
+- [x] **Step 3: Add failing sanitization and mapping cases**
+
+Extend the spec with a table covering every consistent pair and expected
+stage/failure. Add explicit cases proving:
+
+```typescript
+expect(
+    createMpegTsPlaybackEvidence('NetworkError', 'HttpStatusCodeInvalid', {
+        code: 404,
+        msg: 'Not Found secret',
+        url: 'https://provider.example/live.ts?token=secret',
+    })
+).toEqual({
+    engineType: 'NetworkError',
+    engineDetails: 'HttpStatusCodeInvalid',
+    disposition: 'terminal',
+    stage: 'loader',
+    failure: 'http',
+    httpStatus: 404,
+});
+
+expect(
+    createMpegTsPlaybackEvidence('OtherError', 'CodecUnsupported', {
+        code: 503,
+    })
+).toEqual({
+    engineType: 'OtherError',
+    engineDetails: 'CodecUnsupported',
+    disposition: 'terminal',
+    stage: 'unknown',
+    failure: 'unknown',
+});
+```
+
+Also assert status strings, 399, 600, nested `code`, lowercase constants,
+unknown objects, and circular payloads do not add `httpStatus` or throw.
+
+Run the focused spec. Expected: FAIL because the factory is missing.
+
+- [x] **Step 4: Implement the minimal sanitizer**
+
+Create `mpegts-playback-evidence.util.ts` with:
+
+```typescript
+export const MPEGTS_DIAGNOSTIC_VERSION = '1.8.0';
+
+export function createMpegTsPlaybackEvidence(
+    type: unknown,
+    details: unknown,
+    info: unknown
+): MpegTsPlaybackEvidence {
+    const engineType = normalizeEngineType(type);
+    const engineDetails = normalizeEngineDetails(details);
+    const { stage, failure } = deriveMpegTsStageAndFailure(
+        engineType,
+        engineDetails
+    );
+    const httpStatus =
+        engineType === MpegTsPlaybackEngineType.Network &&
+        engineDetails ===
+            MpegTsPlaybackEngineDetails.HttpStatusCodeInvalid
+            ? readHttpStatus(info)
+            : undefined;
+
+    return {
+        engineType,
+        engineDetails,
+        disposition: MpegTsPlaybackDisposition.Terminal,
+        stage,
+        failure,
+        ...(httpStatus === undefined ? {} : { httpStatus }),
+    };
+}
+```
+
+Implement exact `switch` statements for type/detail normalization and the
+eight accepted pairs. `readHttpStatus` reads only top-level `code` and accepts
+integers 400–599. Do not stringify, clone, enumerate, or inspect any message or
+unknown property.
+
+- [x] **Step 5: Run the evidence spec green**
+
+Run the focused Jest command from Step 1.
+
+Expected: PASS with the runtime contract and sanitizer cases green.
+
+- [x] **Step 6: Commit the evidence boundary**
+
+```bash
+git add -- \
+  libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.model.ts \
+  libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.ts \
+  libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.spec.ts
+git commit -m "fix(playback): sanitize mpegts error evidence"
+```
+
+### Task 2: Replace Heuristic Classification With Structured Evidence
+
+**Files:**
+
+- Modify:
+  `libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.model.ts`
+- Modify:
+  `libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.util.ts`
+- Modify:
+  `libs/ui/playback/src/lib/playback-diagnostics/playback-error-patterns.util.ts`
+- Modify:
+  `libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.util.spec.ts`
+- Test:
+  `libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.spec.ts`
+
+- [x] **Step 1: Write failing classifier tests**
+
+Add table-driven expectations that pass evidence, not raw errors:
+
+```typescript
+const issue = classifyMpegTsPlaybackIssue(
+    createMpegTsPlaybackEvidence(
+        'NetworkError',
+        'HttpStatusCodeInvalid',
+        { code: 404, msg: 'secret' }
+    ),
+    createPlaybackSourceMetadata({
+        url: 'https://example.test/missing.ts',
+        mimeType: 'video/mp2t',
+        player: InlinePlaybackPlayer.VideoJs,
+    })
+);
+
+expect(issue).toEqual(
+    expect.objectContaining({
+        code: PlaybackDiagnosticCode.NetworkError,
+        source: PlaybackDiagnosticSource.MpegTs,
+        httpStatus: 404,
+        mpegTs: expect.objectContaining({ failure: 'http' }),
+        externalFallbackRecommended: false,
+    })
+);
+expect(issue.details).toBeUndefined();
+```
+
+Cover timeout/exception → network, early EOF/format/MSE → media decode,
+unsupported format → container, codec → codec, and inconsistent/other/unknown
+→ unknown. Verify only decode/container/codec outcomes recommend fallback.
+
+Run the evidence and diagnostics specs. Expected: FAIL because the classifier
+still accepts raw `MpegTsPlaybackErrorInput` and emits `details`.
+
+- [x] **Step 2: Wire evidence into the shared diagnostic model**
+
+In `playback-diagnostics.model.ts`:
+
+```typescript
+import type { MpegTsPlaybackEvidence } from './mpegts-playback-evidence.model';
+export * from './mpegts-playback-evidence.model';
+```
+
+Remove `MpegTsPlaybackErrorInput` and add:
+
+```typescript
+readonly mpegTs?: MpegTsPlaybackEvidence;
+```
+
+to `PlaybackDiagnostic`.
+
+- [x] **Step 3: Implement evidence-only classification**
+
+Change the signature to:
+
+```typescript
+export function classifyMpegTsPlaybackIssue(
+    evidence: MpegTsPlaybackEvidence,
+    metadata: PlaybackSourceMetadata
+): PlaybackDiagnostic
+```
+
+Map the exact failures from the approved design, pass
+`httpStatus: evidence.httpStatus` and `mpegTs: evidence` to
+`createPlaybackDiagnostic`, and add `mpegTs` to that factory's options,
+destructuring, and result. Export `createMpegTsPlaybackEvidence` from the
+diagnostics facade.
+
+- [x] **Step 4: Remove obsolete mpegts text helpers**
+
+Delete `normalizeErrorDetails`, `isNetworkFailure`, `isEarlyEofFailure`, and
+their serialization helpers from `playback-error-patterns.util.ts`. Keep
+`isBrowserAccessFailure` for native browser errors. Remove other now-unused
+text helpers only when `rg` proves they have no callers.
+
+Run:
+
+```bash
+rg -n "normalizeErrorDetails|isNetworkFailure|isEarlyEofFailure|MpegTsPlaybackErrorInput" \
+  libs/ui/playback/src/lib
+```
+
+Expected: no matches.
+
+- [x] **Step 5: Run classifier tests green**
+
+Run both focused specs by path.
+
+Expected: PASS with no raw message or arbitrary payload retained.
+
+- [x] **Step 6: Commit structured classification**
+
+```bash
+git add -- \
+  libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.model.ts \
+  libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.util.ts \
+  libs/ui/playback/src/lib/playback-diagnostics/playback-error-patterns.util.ts \
+  libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.util.spec.ts \
+  libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.spec.ts
+git commit -m "fix(playback): classify exact mpegts failures"
+```
+
+### Task 3: Route HTML5 Through The Shared Boundary
+
+**Files:**
+
+- Modify:
+  `libs/ui/playback/src/lib/html-video-player/html-video-player-diagnostics.ts`
+- Modify:
+  `libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.spec-fixtures.ts`
+- Modify:
+  `libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.sources.spec.ts`
+
+- [x] **Step 1: Make the mpegts fixture emit registered events**
+
+Give `MockMpegTsPlayer` a listener map and `emit(event, ...args)` helper, matching
+the existing VJS and ArtPlayer test doubles. Preserve lifecycle logging for
+`on`, `off`, attachment, and load.
+
+- [x] **Step 2: Write the failing HTML5 HTTP regression**
+
+Start a `.ts` source, emit:
+
+```typescript
+engine.emit('error', 'NetworkError', 'HttpStatusCodeInvalid', {
+    code: 404,
+    msg: 'Not Found html-secret',
+    url: 'https://provider.example/error?token=html-secret',
+});
+```
+
+Assert the component emits HTML5 source metadata, `network-error`, HTTP 404,
+structured `mpegTs` evidence, no raw `details`, and no external fallback.
+
+Run the focused sources spec. Expected: FAIL because the HTML5 helper still
+passes a raw error object to the classifier.
+
+- [x] **Step 3: Normalize before classification**
+
+Import `createMpegTsPlaybackEvidence` in
+`html-video-player-diagnostics.ts` and change:
+
+```typescript
+classifyMpegTsPlaybackIssue(
+    createMpegTsPlaybackEvidence(error.type, error.details, error.info),
+    createHtml5SourceMetadata(url, 'video/mp2t')
+)
+```
+
+Accept unknown callback values so normalization owns validation.
+
+- [x] **Step 4: Run the HTML5 regression green and commit**
+
+Run the focused sources spec, then:
+
+```bash
+git add -- \
+  libs/ui/playback/src/lib/html-video-player/html-video-player-diagnostics.ts \
+  libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.spec-fixtures.ts \
+  libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.sources.spec.ts
+git commit -m "fix(playback): structure HTML5 mpegts errors"
+```
+
+### Task 4: Route Video.js And ArtPlayer Through The Same Boundary
+
+**Files:**
+
+- Modify: `libs/ui/playback/src/lib/vjs-player/vjs-mpegts-session.ts`
+- Modify: `libs/ui/playback/src/lib/vjs-player/vjs-mpegts-session.spec.ts`
+- Modify: `libs/ui/playback/src/lib/art-player/art-player-source-session.ts`
+- Modify: `libs/ui/playback/src/lib/art-player/art-player-source-session.spec.ts`
+- Modify: `libs/ui/playback/src/lib/art-player/art-player.component.spec.ts`
+
+- [x] **Step 1: Replace the misleading VJS CORS regression**
+
+Change the existing synthetic `FetchError`/CORS case to the real public event:
+
+```typescript
+mpegTsPlayer.emit(
+    'error',
+    'NetworkError',
+    'HttpStatusCodeInvalid',
+    { code: 503, msg: 'provider secret', headers: { Authorization: 'secret' } }
+);
+```
+
+Expect `network-error`, HTTP 503, `player=videojs`, exact mpegts evidence, no
+fallback, and serialized output without either secret. Add a generic
+`NetworkError + Exception` case proving message text that says CORS remains a
+generic network diagnostic.
+
+Run the VJS session spec. Expected: FAIL under the raw classifier contract.
+
+- [x] **Step 2: Normalize in VjsMpegTsSession**
+
+Import the factory and call:
+
+```typescript
+classifyMpegTsPlaybackIssue(
+    createMpegTsPlaybackEvidence(type, details, info),
+    createPlaybackSourceMetadata({
+        url,
+        mimeType: 'video/mp2t',
+        player: InlinePlaybackPlayer.VideoJs,
+    })
+)
+```
+
+Keep duration sync, listener cleanup, play, and teardown unchanged.
+
+- [x] **Step 3: Add the failing ArtPlayer structured regression**
+
+Emit `MediaError + CodecUnsupported` with a secret-bearing `info` object.
+Assert `unsupported-codec`, `player=artplayer`, structured evidence, fallback
+enabled, and no secret in the emitted issue. Update old lowercase/message-based
+fixtures to exact public constants.
+
+Run the ArtPlayer source-session and component specs. Expected: FAIL until the
+session uses the factory.
+
+- [x] **Step 4: Normalize in ArtPlayerSourceSession**
+
+Import `createMpegTsPlaybackEvidence` and pass the callback arguments through
+it before the shared classifier. Change the stored listener parameter types to
+`unknown` so the sanitizer, not the adapter, owns validation. Preserve the
+destroyed/current-engine guard.
+
+- [x] **Step 5: Run all three engine-owner specs green and commit**
+
+Run HTML5 sources, VJS session, ArtPlayer source-session, and ArtPlayer
+component specs by path. Then:
+
+```bash
+git add -- \
+  libs/ui/playback/src/lib/vjs-player/vjs-mpegts-session.ts \
+  libs/ui/playback/src/lib/vjs-player/vjs-mpegts-session.spec.ts \
+  libs/ui/playback/src/lib/art-player/art-player-source-session.ts \
+  libs/ui/playback/src/lib/art-player/art-player-source-session.spec.ts \
+  libs/ui/playback/src/lib/art-player/art-player.component.spec.ts
+git commit -m "fix(playback): share mpegts evidence across players"
+```
+
+### Task 5: Render Only Structured mpegts.js Details
+
+**Files:**
+
+- Modify:
+  `libs/ui/playback/src/lib/web-player-view/web-player-view-diagnostics.utils.ts`
+- Modify:
+  `libs/ui/playback/src/lib/web-player-view/web-player-view.component.spec.ts`
+
+- [x] **Step 1: Write the failing rendering and privacy regression**
+
+Add `createStructuredMpegTsDiagnostic()` with structured HTTP 404 evidence plus
+legacy `details` and native message fields containing sentinels. Assert:
+
+```typescript
+expect(component.getDiagnosticDetails(issue)).toEqual(
+    expect.arrayContaining([
+        {
+            labelKey: 'PLAYBACK_DIAGNOSTICS.DETAIL_ERROR_DETAILS',
+            value:
+                'stage=loader · failure=http · type=NetworkError · ' +
+                'details=HttpStatusCodeInvalid · disposition=terminal · HTTP 404',
+        },
+    ])
+);
+expect(renderedDetails).not.toContain('mpegts-render-secret');
+expect(component.getDiagnosticMeta(issue)).toBe('HTTP 404');
+```
+
+Run the component spec. Expected: FAIL because mpegts evidence is not formatted.
+
+- [x] **Step 2: Add the structured formatter branch**
+
+Before VHS/HLS legacy formatting, add:
+
+```typescript
+if (issue.mpegTs) {
+    return [
+        `stage=${issue.mpegTs.stage}`,
+        `failure=${issue.mpegTs.failure}`,
+        `type=${issue.mpegTs.engineType}`,
+        `details=${issue.mpegTs.engineDetails}`,
+        `disposition=${issue.mpegTs.disposition}`,
+        issue.mpegTs.httpStatus === undefined
+            ? ''
+            : `HTTP ${issue.mpegTs.httpStatus}`,
+    ]
+        .filter((value) => value.length > 0)
+        .join(' · ');
+}
+```
+
+Also suppress the native-message row when `issue.mpegTs` exists, matching the
+HLS/VHS/Shaka structured boundaries.
+
+- [x] **Step 3: Run the view regression green and commit**
+
+```bash
+git add -- \
+  libs/ui/playback/src/lib/web-player-view/web-player-view-diagnostics.utils.ts \
+  libs/ui/playback/src/lib/web-player-view/web-player-view.component.spec.ts
+git commit -m "fix(playback): render structured mpegts evidence"
+```
+
+### Task 6: Update Canonical Documentation And Release Note
+
+**Files:**
+
+- Modify: `docs/architecture/embedded-inline-playback.md`
+- Modify: `AGENTS.md`
+- Modify: `CLAUDE.md`
+- Create: `.changes/playback-structured-mpegts-diagnostics.md`
+
+- [x] **Step 1: Update the canonical diagnostic contract**
+
+Replace the current early-EOF-only mpegts paragraph with the 1.8.0 public
+boundary: exact type/detail pairs, terminal player events, validated HTTP
+status, classification mapping, rejected raw fields, all three owners, and the
+absence of message-based browser-access guesses.
+
+- [x] **Step 2: Keep repository guidance current**
+
+Add the same concise contract to the mpegts ownership summaries in `AGENTS.md`
+and `CLAUDE.md`: all three owners use the shared version-locked evidence
+boundary; raw payloads do not cross it; shared controls remain unchanged.
+
+- [x] **Step 3: Add the user-facing release note**
+
+Create:
+
+```markdown
+---
+type: fix
+area: playback
+issues: [1159]
+---
+
+MPEG-TS playback errors now show exact engine evidence, including HTTP status,
+without exposing provider response details. Format, codec, truncated-stream,
+and MediaSource failures now produce more accurate fallback guidance.
+```
+
+Keep the body below 400 characters.
+
+- [x] **Step 4: Validate docs and note, then commit**
+
+Run:
+
+```bash
+git diff --check
+pnpm run release:notes:validate
+```
+
+Expected: exit 0. Then:
+
+```bash
+git add -- \
+  docs/architecture/embedded-inline-playback.md \
+  AGENTS.md CLAUDE.md \
+  .changes/playback-structured-mpegts-diagnostics.md
+git commit -m "docs(playback): document structured mpegts diagnostics"
+```
+
+### Task 7: Complete Validation And Local P1/P2 Review
+
+**Files:**
+
+- Verify all files changed since `origin/master`
+
+- [x] **Step 1: Run focused regression tests**
+
+Run all new and changed spec files by path with the web ESM Jest config.
+
+Expected: every focused suite passes.
+
+- [x] **Step 2: Run the affected validation ladder**
+
+```bash
+pnpm nx test ui-playback
+pnpm nx lint ui-playback
+pnpm run typecheck:web
+pnpm run i18n:check
+pnpm run release:notes:validate
+```
+
+Expected: all commands exit 0. No new E2E is required because source routing,
+player lifecycle, actions, and UI layout do not change; engine events, all
+three adapters, classification, privacy, and rendered output have deterministic
+unit/integration coverage.
+
+- [x] **Step 3: Inspect size, scope, and accidental raw-data retention**
+
+```bash
+git diff --check origin/master...HEAD
+git diff --stat origin/master...HEAD
+rg -n "JSON\.stringify|info\.msg|error\.message|normalizeErrorDetails|isNetworkFailure|isEarlyEofFailure" \
+  libs/ui/playback/src/lib/playback-diagnostics \
+  libs/ui/playback/src/lib/html-video-player/html-video-player-diagnostics.ts \
+  libs/ui/playback/src/lib/vjs-player/vjs-mpegts-session.ts \
+  libs/ui/playback/src/lib/art-player/art-player-source-session.ts
+```
+
+Expected: no mpegts error serialization/message inference; any unrelated
+matches are inspected and justified.
+
+- [x] **Step 4: Perform the requested local Codex review**
+
+Review `origin/master...HEAD` specifically for P1/P2 defects:
+
+- false classification from mismatched type/detail pairs;
+- unvalidated or duplicated HTTP status;
+- raw provider data escaping through top-level or rendered fields;
+- different behavior among HTML5, Video.js, and ArtPlayer;
+- missing stale-listener/teardown guards;
+- incorrect fallback behavior;
+- version-lock drift;
+- missing tests or stale canonical docs.
+
+Fix every confirmed P1/P2 finding through a new failing regression first, rerun
+the focused and affected validation ladders, and commit the fixes. Repeat until
+the review is clean.
+
+- [x] **Step 5: Verify the final branch state**
+
+```bash
+git status --short --branch
+git log --oneline origin/master..HEAD
+git diff --check origin/master...HEAD
+```
+
+Expected: clean worktree, focused commits only, and no whitespace errors.
+
+### Task 8: Publish The Pull Request After Explicit Authorization
+
+**Files:**
+
+- Inspect: all changes in `origin/master...HEAD`
+
+- [ ] **Step 1: Confirm final staged and branch scope**
+
+Do not stage unrelated files. Verify the exact branch and commits before push.
+
+- [ ] **Step 2: Push only after user authorization**
+
+```bash
+git push -u origin agent/structure-mpegts-diagnostics
+```
+
+- [ ] **Step 3: Create one ready PR only after user authorization**
+
+Use base `master`, head `agent/structure-mpegts-diagnostics`, and summarize:
+
+- version-locked public mpegts.js evidence;
+- exact HTTP/format/codec/EOF/MSE classification;
+- shared HTML5, Video.js, and ArtPlayer integration;
+- privacy boundary and future recommendation-layer compatibility;
+- tests and validation run.
+
+Link issue #1159 and include the release note. Do not create multiple or draft
+PRs unless the user requests that state.
diff --git a/docs/superpowers/specs/2026-08-01-structured-mpegts-diagnostics-design.md b/docs/superpowers/specs/2026-08-01-structured-mpegts-diagnostics-design.md
new file mode 100644
index 000000000..7c0baeab7
--- /dev/null
+++ b/docs/superpowers/specs/2026-08-01-structured-mpegts-diagnostics-design.md
@@ -0,0 +1,301 @@
+# Structured mpegts.js Diagnostics
+
+## Context
+
+PR #1314 stopped treating ambiguous native media errors as codec evidence and
+retained explicit HTTP status. PR #1316 added an allowlisted hls.js boundary,
+PR #1317 added one for Video.js/VHS, and PR #1318 added one for Shaka Player.
+mpegts.js is now the remaining browser source engine whose diagnostic path
+serializes arbitrary error payloads and classifies them with substring
+heuristics.
+
+The locked workspace installs mpegts.js `1.8.0`. Its public player error event
+has three arguments: error type, error detail, and an information value. The
+runtime exports exact `ErrorTypes` and `ErrorDetails` constants. The current
+IPTVnator classifier instead lowercases the arguments, serializes arbitrary
+`info`, and searches the resulting text for network, access, codec, format,
+MSE, and early-EOF fragments. This can misdiagnose failures, retain provider
+text, and miss reliable facts such as the HTTP status carried by
+`HttpStatusCodeInvalid`.
+
+All three built-in web players own a mpegts.js integration:
+
+- `HtmlVideoPlayerComponent` for the built-in HTML5 player;
+- `VjsMpegTsSession` for Video.js;
+- `ArtPlayerSourceSession` for ArtPlayer.
+
+They must cross the same evidence boundary so the selected player does not
+change the diagnosis for an identical engine event.
+
+## Goals
+
+- Add one minimal, allowlisted `MpegTsPlaybackEvidence` boundary shared by all
+  three mpegts.js owners.
+- Version-lock the accepted public constants to installed mpegts.js `1.8.0`.
+- Classify only exact, internally consistent public type/detail pairs.
+- Surface a validated HTTP 4xx/5xx status for
+  `NetworkError + HttpStatusCodeInvalid`.
+- Preserve the existing useful distinction for unrecoverable early EOF while
+  replacing text inference with the exact public detail.
+- Prevent arbitrary `info`, messages, URLs, headers, bodies, credentials, and
+  provider objects from reaching stored or rendered diagnostics.
+- Shape the evidence so a later player-neutral recommendation layer can use it
+  without coupling diagnostics to `PlayerController`.
+
+## Non-goals
+
+- Building the cross-player recommendation matrix.
+- Moving recommendations, diagnostics, or fallback policy into
+  `PlayerController`.
+- Automatic failover, player preference changes, retries beyond those already
+  owned by mpegts.js, probes, persistence, correlation, or diagnostic history.
+- Adding new top-level diagnostic codes or changing diagnostic layout and
+  translations.
+- Inferring CORS, mixed content, Content Security Policy, private-network
+  access, codec, format, or pipeline stage from message text.
+- Inspecting mpegts.js loaders, demuxers, workers, or MediaSource internals at
+  runtime.
+- Changing source selection, live/VOD mode, playback controls, duration
+  correction, or engine cleanup.
+
+## Approaches Considered
+
+### Public allowlisted evidence boundary (selected)
+
+Normalize the public error-event arguments immediately into a small evidence
+object. Accept only exact mpegts.js `1.8.0` type/detail constants, derive stage
+and failure from consistent pairs, and read only a validated numeric status
+from the documented network error-info slot. Classification and rendering then
+receive the sanitized evidence rather than the raw event.
+
+This is the strongest stable contract available. It fixes HTTP diagnostics,
+removes unsafe serialization, keeps all three players consistent, and gives a
+future recommendation layer explicit facts instead of prose.
+
+### Exact constants plus message heuristics
+
+Keep the public constants but continue reading `info.msg` to infer browser
+access or more specific causes. This could preserve a few synthetic CORS cases,
+but browser fetch exceptions commonly expose only generic text such as
+`Failed to fetch`. Message text is not a stable public taxonomy and may contain
+provider data. This approach is rejected.
+
+### Add HTTP status to the existing classifier
+
+Special-case `HttpStatusCodeInvalid` while leaving the rest of the substring
+classifier unchanged. This would address issue #1159 narrowly but retain the
+privacy and accuracy problems for every other mpegts.js failure. It would also
+leave no coherent evidence contract for later recommendations. This approach
+is rejected.
+
+## Version-Locked Public Contract
+
+The production allowlist accepts the exact public constants exported by
+mpegts.js `1.8.0`.
+
+Error types:
+
+- `NetworkError`;
+- `MediaError`;
+- `OtherError`.
+
+Error details:
+
+- `Exception`;
+- `HttpStatusCodeInvalid`;
+- `ConnectingTimeout`;
+- `UnrecoverableEarlyEof`;
+- `MediaMSEError`;
+- `FormatError`;
+- `FormatUnsupported`;
+- `CodecUnsupported`.
+
+The package also exports loader-only `EarlyEof`, but it is not a public player
+`ErrorDetails` value. mpegts.js attempts its finite-source reconnect internally
+and exposes only `UnrecoverableEarlyEof` through the player error event when
+recovery cannot complete. IPTVnator must not create a terminal diagnostic for
+the internal recoverable value.
+
+A contract test compares the allowlist and package version with the real
+installed runtime. A dependency upgrade must fail that test and trigger a new
+audit before changed or additional constants are accepted.
+
+## Evidence Contract
+
+`MpegTsPlaybackEvidence` contains:
+
+- `engineType`: exact `NetworkError`, `MediaError`, or `OtherError`, otherwise
+  `unknown`;
+- `engineDetails`: one exact public mpegts.js detail, otherwise `unknown`;
+- `disposition`: `terminal`;
+- `stage`: `loader`, `demux`, `media-source`, or `unknown`;
+- `failure`: `http`, `timeout`, `network`, `truncated-stream`, `format`,
+  `codec`, `media-source`, or `unknown`;
+- optional `httpStatus`: an integer from 400 through 599.
+
+Stage and failure names are app-owned and stable. Exact engine type and detail
+remain available separately so technical output still identifies the public
+mpegts.js condition.
+
+The evidence object does not retain:
+
+- `info.msg` or any other message;
+- arbitrary or serialized `info` values;
+- request, response, redirect, or source URLs;
+- headers, response text, bodies, events, exceptions, or loader objects;
+- provider metadata, tokens, cookies, credentials, or unknown properties.
+
+The existing `PlaybackDiagnostic.sourceUrl` remains the active source metadata
+used by Retry, Copy URL, and explicit external-player actions. No URL is copied
+from an engine error.
+
+## Sanitization And HTTP Status
+
+`createMpegTsPlaybackEvidence(type, details, info)` validates exact,
+case-sensitive public values. Unknown strings, differently cased variants,
+numbers, objects, and missing values become `unknown`; message fragments never
+upgrade them.
+
+The boundary reads `info.code` only for the exact
+`NetworkError + HttpStatusCodeInvalid` pair. It retains the value only when it
+is an integer from 400 through 599. Status-like fields on any other pair,
+inside nested objects, or supplied as strings are ignored. No other `info`
+property is read or copied.
+
+The validated status is mirrored to the top-level diagnostic so the existing
+metadata badge shows `HTTP 404` or `HTTP 5xx` without a UI redesign.
+
+## Stage And Failure Mapping
+
+Only internally consistent public type/detail pairs receive a stage or failure:
+
+| Public type | Public detail | Stage | Failure |
+| --- | --- | --- | --- |
+| `NetworkError` | `HttpStatusCodeInvalid` | `loader` | `http` |
+| `NetworkError` | `ConnectingTimeout` | `loader` | `timeout` |
+| `NetworkError` | `Exception` | `loader` | `network` |
+| `NetworkError` | `UnrecoverableEarlyEof` | `loader` | `truncated-stream` |
+| `MediaError` | `FormatError` | `demux` | `format` |
+| `MediaError` | `FormatUnsupported` | `demux` | `format` |
+| `MediaError` | `CodecUnsupported` | `demux` | `codec` |
+| `MediaError` | `MediaMSEError` | `media-source` | `media-source` |
+
+`OtherError`, unknown values, and mismatched pairs keep both fields unknown.
+For example, `OtherError + CodecUnsupported` must not become codec evidence.
+This fail-closed rule prevents a future engine change or malformed event from
+borrowing meaning from only half of the public contract.
+
+## Lifecycle And Disposition
+
+The public player `ERROR` event is terminal for IPTVnator's diagnostic
+boundary. The installed engine handles recoverable finite-source early EOF
+inside `IOController`; only failed recovery becomes
+`UnrecoverableEarlyEof` and reaches the player event. Network, demux, and MSE
+error paths likewise reach the player event after the active engine operation
+has failed.
+
+IPTVnator does not subscribe to internal recovery events or duplicate engine
+retry logic. All accepted evidence therefore records `disposition=terminal`.
+
+## User-Facing Classification
+
+`classifyMpegTsPlaybackIssue` consumes sanitized evidence with this mapping:
+
+1. `failure=http`, `timeout`, or `network` → `network-error`.
+2. `failure=truncated-stream` → `media-decode-error`.
+3. Exact `MediaError + FormatUnsupported` → `unsupported-container`.
+4. Exact `MediaError + CodecUnsupported` → `unsupported-codec`.
+5. `failure=format` or `media-source` → `media-decode-error`.
+6. Everything else → `unknown-playback-error`.
+
+The existing code-derived fallback behavior remains intentional:
+
+- HTTP, timeout, generic network, and unknown failures do not claim that a
+  different decoder will fix the provider response;
+- truncated-stream, unsupported-container, unsupported-codec, format, and
+  MediaSource failures may offer configured MPV/VLC actions because another
+  demuxer or media pipeline can plausibly handle the same source.
+
+No mpegts.js error becomes `browser-access-error`. The public constants do not
+distinguish CORS, mixed content, CSP, or private-network access from a generic
+fetch exception, and status zero is not sufficient evidence.
+
+## Runtime Integration
+
+The raw event must cross the boundary once in each owner:
+
+- `emitMpegTsPlaybackError` creates evidence for
+  `HtmlVideoPlayerComponent`;
+- `VjsMpegTsSession` creates evidence before emitting its issue;
+- `ArtPlayerSourceSession` creates evidence before emitting its issue.
+
+All three call the same classifier with source metadata that preserves their
+existing `InlinePlaybackPlayer` identity. No owner keeps or forwards the raw
+event after normalization. Listener binding, stale-engine guards, live/VOD
+mode, duration correction, source routing, play calls, and teardown remain
+unchanged.
+
+## Relationship To Shared Controls And Recommendations
+
+`PlayerController` remains the engine-neutral command/state/capability
+contract. It does not own error taxonomy, fallback policy, or provider
+evidence.
+
+Playback diagnostics are a sibling player-neutral layer: engine adapters emit
+sanitized evidence, the diagnostic classifier maps it to a user-facing issue,
+and the existing viewport renders that issue. A later recommendation layer can
+consume diagnostic code, source, engine evidence, source metadata, and runtime
+capabilities to explain whether another player is likely to help. That later
+work must not require parsing the technical-details string or changing the
+controls contract.
+
+## User Interface
+
+The existing technical `Error details` row renders only structured mpegts.js
+evidence, for example:
+
+`stage=loader · failure=http · type=NetworkError · details=HttpStatusCodeInvalid · disposition=terminal · HTTP 404`
+
+When `issue.mpegTs` exists, legacy raw `details` and native message fields are
+ignored even if a caller accidentally supplies them. Existing titles,
+descriptions, HTTP badge, Retry, Copy URL, external-player actions, layout, and
+translations remain unchanged.
+
+## Testing
+
+Use test-driven development:
+
+- Compare the accepted constants and version with the real installed
+  mpegts.js `1.8.0` runtime.
+- Cover every consistent public type/detail mapping.
+- Prove mismatched, unknown, differently cased, and malformed inputs remain
+  unknown.
+- Prove only exact `HttpStatusCodeInvalid` can expose a validated HTTP 4xx/5xx
+  status.
+- Prove `info.msg`, nested status, URLs, headers, bodies, exceptions, and
+  arbitrary provider objects never enter evidence or rendered details.
+- Cover HTTP 404, timeout, exception, unrecoverable early EOF, format error,
+  unsupported format, unsupported codec, MSE error, other, and unknown
+  classification.
+- Cover evidence creation and issue emission through HTML5, Video.js, and
+  ArtPlayer integrations.
+- Prove the rendered detail row uses only structured mpegts.js evidence and
+  preserves the HTTP metadata badge.
+
+Run the focused red/green tests, complete `ui-playback` unit and lint targets,
+web typecheck, i18n validation, release-note validation, and the repository
+test-impact pass. No new E2E case is required because source selection,
+playback lifecycle, controls, actions, and diagnostic layout remain unchanged;
+the engine event, three adapter boundaries, classifier, and rendered output are
+covered directly and deterministically.
+
+## Documentation And Release Note
+
+Update `docs/architecture/embedded-inline-playback.md` as the canonical
+browser diagnostic contract. Update the mpegts.js diagnostic summaries in
+`AGENTS.md` and `CLAUDE.md` because they describe the affected player engines
+and evidence boundaries. No `player-controls-contract.md` change is needed
+because the controls contract does not change.
+
+Add a `fix(playback)` note under `.changes/` because users receive accurate HTTP
+status, safer technical details, and more precise mpegts.js diagnoses.
diff --git a/libs/ui/playback/src/lib/art-player/art-player-source-session.spec.ts b/libs/ui/playback/src/lib/art-player/art-player-source-session.spec.ts
index 3533dfd45..fcf24cf3b 100644
--- a/libs/ui/playback/src/lib/art-player/art-player-source-session.spec.ts
+++ b/libs/ui/playback/src/lib/art-player/art-player-source-session.spec.ts
@@ -186,10 +186,11 @@ describe('ArtPlayerSourceSession', () => {
             details: 'stale callback',
             fatal: true,
         });
+        const secret = 'art-mpegts-secret';
         mpegTsInstances.at(-1)?.handlers.get('error')?.(
-            'mediaError',
-            'unsupported codec',
-            {}
+            'MediaError',
+            'CodecUnsupported',
+            { message: secret, headers: { Authorization: secret } }
         );
 
         expect(emitted).toEqual([
@@ -199,11 +200,18 @@ describe('ArtPlayerSourceSession', () => {
                 player: 'artplayer',
             }),
             expect.objectContaining({
+                code: 'unsupported-codec',
                 source: 'mpegts',
                 sourceUrl: 'https://example.test/live.ts',
                 player: 'artplayer',
+                mpegTs: expect.objectContaining({
+                    engineType: 'MediaError',
+                    engineDetails: 'CodecUnsupported',
+                    failure: 'codec',
+                }),
             }),
         ]);
+        expect(JSON.stringify(emitted)).not.toContain(secret);
     });
 
     it('reports only structured evidence for a fatal HLS manifest HTTP failure', () => {
diff --git a/libs/ui/playback/src/lib/art-player/art-player-source-session.ts b/libs/ui/playback/src/lib/art-player/art-player-source-session.ts
index b5cda67c8..5c71da94b 100644
--- a/libs/ui/playback/src/lib/art-player/art-player-source-session.ts
+++ b/libs/ui/playback/src/lib/art-player/art-player-source-session.ts
@@ -10,6 +10,7 @@ import {
     classifyMpegTsPlaybackIssue,
     classifyUnsupportedHlsManifestCodecs,
     createHlsPlaybackEvidence,
+    createMpegTsPlaybackEvidence,
     createPlaybackSourceMetadata,
 } from '../playback-diagnostics/playback-diagnostics.util';
 import type { WebVideoControlsAdapter } from '../player-controls';
@@ -66,7 +67,7 @@ export class ArtPlayerSourceSession {
         | null = null;
     private mpegTsPlayer: mpegts.Player | null = null;
     private mpegTsErrorListener:
-        | ((type: string, details: string, info: unknown) => void)
+        | ((type: unknown, details: unknown, info: unknown) => void)
         | null = null;
     private shakaSession: ShakaVideoSession | null = null;
     private destroyed = false;
@@ -192,7 +193,7 @@ export class ArtPlayerSourceSession {
             }
             this.config.emitPlaybackIssue(
                 classifyMpegTsPlaybackIssue(
-                    { type, details, info },
+                    createMpegTsPlaybackEvidence(type, details, info),
                     this.createSourceMetadata(url, 'video/mp2t')
                 )
             );
diff --git a/libs/ui/playback/src/lib/art-player/art-player.component.spec.ts b/libs/ui/playback/src/lib/art-player/art-player.component.spec.ts
index 8ad9a83b7..60f0f0bcb 100644
--- a/libs/ui/playback/src/lib/art-player/art-player.component.spec.ts
+++ b/libs/ui/playback/src/lib/art-player/art-player.component.spec.ts
@@ -239,10 +239,11 @@ describe('ArtPlayerComponent', () => {
             artPlayerInstances[0].video,
             'https://example.com/live/channel.ts'
         );
+        const secret = 'art-component-mpegts-secret';
         mpegTsInstances[0].handlers.get('error')?.(
-            'mediaError',
-            'unsupported codec',
-            {}
+            'MediaError',
+            'CodecUnsupported',
+            { message: secret }
         );
 
         expect(issues).toEqual([
@@ -250,9 +251,15 @@ describe('ArtPlayerComponent', () => {
                 code: 'unsupported-codec',
                 source: 'mpegts',
                 sourceUrl: 'https://example.com/live/channel.ts',
+                mpegTs: expect.objectContaining({
+                    engineType: 'MediaError',
+                    engineDetails: 'CodecUnsupported',
+                    failure: 'codec',
+                }),
                 externalFallbackRecommended: true,
             }),
         ]);
+        expect(JSON.stringify(issues)).not.toContain(secret);
     });
 
     it('emits playbackEnded exactly once for a native ended event and not during reload or destroy', () => {
diff --git a/libs/ui/playback/src/lib/html-video-player/html-video-player-diagnostics.ts b/libs/ui/playback/src/lib/html-video-player/html-video-player-diagnostics.ts
index 3d4ffa8bd..048176b95 100644
--- a/libs/ui/playback/src/lib/html-video-player/html-video-player-diagnostics.ts
+++ b/libs/ui/playback/src/lib/html-video-player/html-video-player-diagnostics.ts
@@ -7,6 +7,7 @@ import {
     classifyMpegTsPlaybackIssue,
     classifyUnsupportedHlsManifestCodecs,
     createHlsPlaybackEvidence,
+    createMpegTsPlaybackEvidence,
     createPlaybackSourceMetadata,
 } from '../playback-diagnostics/playback-diagnostics.util';
 
@@ -69,12 +70,16 @@ export function emitFatalHlsPlaybackError(
 
 export function emitMpegTsPlaybackError(
     url: string,
-    error: { type: string; details: string; info: unknown },
+    error: { type: unknown; details: unknown; info: unknown },
     emitPlaybackIssue: (issue: PlaybackDiagnostic) => void
 ): void {
     emitPlaybackIssue(
         classifyMpegTsPlaybackIssue(
-            error,
+            createMpegTsPlaybackEvidence(
+                error.type,
+                error.details,
+                error.info
+            ),
             createHtml5SourceMetadata(url, 'video/mp2t')
         )
     );
diff --git a/libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.sources.spec.ts b/libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.sources.spec.ts
index 929772534..ac5f748d5 100644
--- a/libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.sources.spec.ts
+++ b/libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.sources.spec.ts
@@ -114,6 +114,52 @@ describe('HtmlVideoPlayerComponent shared controls sources', () => {
         }
     );
 
+    it('emits structured HTTP evidence for mpegts.js failures', () => {
+        mpegTsIsSupported.mockReturnValue(true);
+        const { component } = renderSharedControls(
+            HtmlVideoPlayerComponent,
+            fixtures,
+            {
+                channel: {
+                    ...TEST_CHANNEL,
+                    url: 'https://example.test/missing.ts',
+                },
+            }
+        );
+        const issues: unknown[] = [];
+        component.playbackIssue.subscribe((issue) => issues.push(issue));
+        const secret = 'html-mpegts-secret';
+
+        mpegTsInstances[0].emit(
+            'error',
+            'NetworkError',
+            'HttpStatusCodeInvalid',
+            {
+                code: 404,
+                msg: `Not Found ${secret}`,
+                url: `https://provider.example/error?token=${secret}`,
+            }
+        );
+
+        expect(issues).toEqual([
+            expect.objectContaining({
+                code: 'network-error',
+                source: 'mpegts',
+                sourceUrl: 'https://example.test/missing.ts',
+                player: 'html5',
+                httpStatus: 404,
+                mpegTs: expect.objectContaining({
+                    engineType: 'NetworkError',
+                    engineDetails: 'HttpStatusCodeInvalid',
+                    failure: 'http',
+                    httpStatus: 404,
+                }),
+                externalFallbackRecommended: false,
+            }),
+        ]);
+        expect(JSON.stringify(issues)).not.toContain(secret);
+    });
+
     it('owns one MPEG-TS source between media attachment and loading', () => {
         mpegTsIsSupported.mockReturnValue(true);
         const { component } = renderSharedControls(
diff --git a/libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.spec-fixtures.ts b/libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.spec-fixtures.ts
index 65bce6152..006f4d97b 100644
--- a/libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.spec-fixtures.ts
+++ b/libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.spec-fixtures.ts
@@ -93,10 +93,22 @@ export class MockHls {
 }
 
 export class MockMpegTsPlayer {
+    private readonly listeners = new Map<
+        string,
+        Set<(...args: unknown[]) => void>
+    >();
     readonly attachMediaElement = jest.fn(() =>
         lifecycle.push('mpegts:attachMedia')
     );
-    readonly on = jest.fn();
+    readonly on = jest.fn(
+        (event: string, listener: (...args: unknown[]) => void) => {
+            const listeners =
+                this.listeners.get(event) ??
+                new Set<(...args: unknown[]) => void>();
+            listeners.add(listener);
+            this.listeners.set(event, listeners);
+        }
+    );
     readonly load = jest.fn(() => lifecycle.push('mpegts:load'));
     readonly pause = jest.fn();
     readonly unload = jest.fn();
@@ -106,6 +118,12 @@ export class MockMpegTsPlayer {
     constructor() {
         mpegTsInstances.push(this);
     }
+
+    emit(event: string, ...args: unknown[]): void {
+        for (const listener of this.listeners.get(event) ?? []) {
+            listener(...args);
+        }
+    }
 }
 
 export const mpegTsCreatePlayer = jest.fn(() => new MockMpegTsPlayer());
diff --git a/libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.model.ts b/libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.model.ts
new file mode 100644
index 000000000..072334560
--- /dev/null
+++ b/libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.model.ts
@@ -0,0 +1,64 @@
+export const MpegTsPlaybackEngineType = {
+    Network: 'NetworkError',
+    Media: 'MediaError',
+    Other: 'OtherError',
+    Unknown: 'unknown',
+} as const;
+
+export type MpegTsPlaybackEngineType =
+    (typeof MpegTsPlaybackEngineType)[keyof typeof MpegTsPlaybackEngineType];
+
+export const MpegTsPlaybackEngineDetails = {
+    NetworkException: 'Exception',
+    HttpStatusCodeInvalid: 'HttpStatusCodeInvalid',
+    ConnectingTimeout: 'ConnectingTimeout',
+    UnrecoverableEarlyEof: 'UnrecoverableEarlyEof',
+    MediaMseError: 'MediaMSEError',
+    FormatError: 'FormatError',
+    FormatUnsupported: 'FormatUnsupported',
+    CodecUnsupported: 'CodecUnsupported',
+    Unknown: 'unknown',
+} as const;
+
+export type MpegTsPlaybackEngineDetails =
+    (typeof MpegTsPlaybackEngineDetails)[keyof typeof MpegTsPlaybackEngineDetails];
+
+export const MpegTsPlaybackDisposition = {
+    Terminal: 'terminal',
+} as const;
+
+export type MpegTsPlaybackDisposition =
+    (typeof MpegTsPlaybackDisposition)[keyof typeof MpegTsPlaybackDisposition];
+
+export const MpegTsPlaybackStage = {
+    Loader: 'loader',
+    Demux: 'demux',
+    MediaSource: 'media-source',
+    Unknown: 'unknown',
+} as const;
+
+export type MpegTsPlaybackStage =
+    (typeof MpegTsPlaybackStage)[keyof typeof MpegTsPlaybackStage];
+
+export const MpegTsPlaybackFailure = {
+    Http: 'http',
+    Timeout: 'timeout',
+    Network: 'network',
+    TruncatedStream: 'truncated-stream',
+    Format: 'format',
+    Codec: 'codec',
+    MediaSource: 'media-source',
+    Unknown: 'unknown',
+} as const;
+
+export type MpegTsPlaybackFailure =
+    (typeof MpegTsPlaybackFailure)[keyof typeof MpegTsPlaybackFailure];
+
+export interface MpegTsPlaybackEvidence {
+    readonly engineType: MpegTsPlaybackEngineType;
+    readonly engineDetails: MpegTsPlaybackEngineDetails;
+    readonly disposition: MpegTsPlaybackDisposition;
+    readonly stage: MpegTsPlaybackStage;
+    readonly failure: MpegTsPlaybackFailure;
+    readonly httpStatus?: number;
+}
diff --git a/libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.spec.ts b/libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.spec.ts
new file mode 100644
index 000000000..583f4cd34
--- /dev/null
+++ b/libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.spec.ts
@@ -0,0 +1,239 @@
+import mpegts from 'mpegts.js';
+import {
+    InlinePlaybackPlayer,
+    PlaybackDiagnosticCode,
+    classifyMpegTsPlaybackIssue,
+    createPlaybackSourceMetadata,
+} from './playback-diagnostics.util';
+import {
+    MpegTsPlaybackEngineDetails,
+    MpegTsPlaybackEngineType,
+} from './mpegts-playback-evidence.model';
+import {
+    MPEGTS_DIAGNOSTIC_VERSION,
+    createMpegTsPlaybackEvidence,
+} from './mpegts-playback-evidence.util';
+
+const METADATA = createPlaybackSourceMetadata({
+    url: 'https://example.test/live.ts',
+    mimeType: 'video/mp2t',
+    player: InlinePlaybackPlayer.VideoJs,
+});
+
+describe('mpegts.js playback evidence', () => {
+    it('locks the accepted public contract to mpegts.js 1.8.0', () => {
+        expect(mpegts.version).toBe(MPEGTS_DIAGNOSTIC_VERSION);
+        expect(mpegts.ErrorTypes).toEqual({
+            NETWORK_ERROR: MpegTsPlaybackEngineType.Network,
+            MEDIA_ERROR: MpegTsPlaybackEngineType.Media,
+            OTHER_ERROR: MpegTsPlaybackEngineType.Other,
+        });
+        expect(mpegts.ErrorDetails).toEqual({
+            NETWORK_EXCEPTION:
+                MpegTsPlaybackEngineDetails.NetworkException,
+            NETWORK_STATUS_CODE_INVALID:
+                MpegTsPlaybackEngineDetails.HttpStatusCodeInvalid,
+            NETWORK_TIMEOUT: MpegTsPlaybackEngineDetails.ConnectingTimeout,
+            NETWORK_UNRECOVERABLE_EARLY_EOF:
+                MpegTsPlaybackEngineDetails.UnrecoverableEarlyEof,
+            MEDIA_MSE_ERROR: MpegTsPlaybackEngineDetails.MediaMseError,
+            MEDIA_FORMAT_ERROR: MpegTsPlaybackEngineDetails.FormatError,
+            MEDIA_FORMAT_UNSUPPORTED:
+                MpegTsPlaybackEngineDetails.FormatUnsupported,
+            MEDIA_CODEC_UNSUPPORTED:
+                MpegTsPlaybackEngineDetails.CodecUnsupported,
+        });
+    });
+
+    it.each([
+        [
+            'NetworkError',
+            'HttpStatusCodeInvalid',
+            'loader',
+            'http',
+        ],
+        ['NetworkError', 'ConnectingTimeout', 'loader', 'timeout'],
+        ['NetworkError', 'Exception', 'loader', 'network'],
+        [
+            'NetworkError',
+            'UnrecoverableEarlyEof',
+            'loader',
+            'truncated-stream',
+        ],
+        ['MediaError', 'FormatError', 'demux', 'format'],
+        ['MediaError', 'FormatUnsupported', 'demux', 'format'],
+        ['MediaError', 'CodecUnsupported', 'demux', 'codec'],
+        [
+            'MediaError',
+            'MediaMSEError',
+            'media-source',
+            'media-source',
+        ],
+    ])(
+        'maps %s + %s to %s/%s',
+        (engineType, engineDetails, stage, failure) => {
+            expect(
+                createMpegTsPlaybackEvidence(
+                    engineType,
+                    engineDetails,
+                    undefined
+                )
+            ).toEqual({
+                engineType,
+                engineDetails,
+                disposition: 'terminal',
+                stage,
+                failure,
+            });
+        }
+    );
+
+    it.each([
+        ['OtherError', 'CodecUnsupported'],
+        ['NetworkError', 'CodecUnsupported'],
+        ['MediaError', 'ConnectingTimeout'],
+        ['networkerror', 'HttpStatusCodeInvalid'],
+        ['NetworkError', 'httpstatuscodeinvalid'],
+        [{ type: 'NetworkError' }, 'Exception'],
+        ['MediaError', { details: 'FormatError' }],
+    ])('keeps inconsistent or malformed %p + %p evidence unknown', (type, details) => {
+        const evidence = createMpegTsPlaybackEvidence(type, details, {
+            code: 503,
+        });
+
+        expect(evidence.stage).toBe('unknown');
+        expect(evidence.failure).toBe('unknown');
+        expect(evidence.httpStatus).toBeUndefined();
+    });
+
+    it.each([399, 600, 404.5, '404', null, undefined])(
+        'rejects invalid HTTP status %p',
+        (code) => {
+            const evidence = createMpegTsPlaybackEvidence(
+                'NetworkError',
+                'HttpStatusCodeInvalid',
+                { code }
+            );
+
+            expect(evidence.httpStatus).toBeUndefined();
+        }
+    );
+
+    it('reads HTTP status only from the exact top-level public slot', () => {
+        expect(
+            createMpegTsPlaybackEvidence(
+                'NetworkError',
+                'HttpStatusCodeInvalid',
+                { code: 404 }
+            ).httpStatus
+        ).toBe(404);
+        expect(
+            createMpegTsPlaybackEvidence('NetworkError', 'Exception', {
+                code: 503,
+            }).httpStatus
+        ).toBeUndefined();
+        expect(
+            createMpegTsPlaybackEvidence(
+                'NetworkError',
+                'HttpStatusCodeInvalid',
+                { response: { code: 503 } }
+            ).httpStatus
+        ).toBeUndefined();
+    });
+
+    it('does not inspect or retain arbitrary engine information', () => {
+        const secret = 'mpegts-info-secret';
+        const circularInfo: Record<string, unknown> = {
+            code: 404,
+            msg: `Not Found ${secret}`,
+            url: `https://provider.example/error?token=${secret}`,
+            headers: { Authorization: secret },
+        };
+        circularInfo['self'] = circularInfo;
+
+        const evidence = createMpegTsPlaybackEvidence(
+            'NetworkError',
+            'HttpStatusCodeInvalid',
+            circularInfo
+        );
+
+        expect(evidence.httpStatus).toBe(404);
+        expect(JSON.stringify(evidence)).not.toContain(secret);
+        expect(JSON.stringify(evidence)).not.toContain('provider.example');
+    });
+
+    it.each([
+        ['NetworkError', 'HttpStatusCodeInvalid', 'network-error', false],
+        ['NetworkError', 'ConnectingTimeout', 'network-error', false],
+        ['NetworkError', 'Exception', 'network-error', false],
+        [
+            'NetworkError',
+            'UnrecoverableEarlyEof',
+            'media-decode-error',
+            true,
+        ],
+        ['MediaError', 'FormatError', 'media-decode-error', true],
+        [
+            'MediaError',
+            'FormatUnsupported',
+            'unsupported-container',
+            true,
+        ],
+        [
+            'MediaError',
+            'CodecUnsupported',
+            'unsupported-codec',
+            true,
+        ],
+        ['MediaError', 'MediaMSEError', 'media-decode-error', true],
+        ['OtherError', 'Exception', 'unknown-playback-error', false],
+    ])(
+        'classifies %s + %s as %s with fallback=%s',
+        (type, details, code, externalFallbackRecommended) => {
+            const issue = classifyMpegTsPlaybackIssue(
+                createMpegTsPlaybackEvidence(type, details, undefined),
+                METADATA
+            );
+
+            expect(issue.code).toBe(code);
+            expect(issue.externalFallbackRecommended).toBe(
+                externalFallbackRecommended
+            );
+            expect(issue.details).toBeUndefined();
+        }
+    );
+
+    it('preserves an exact HTTP failure without retaining provider details', () => {
+        const secret = 'mpegts-http-secret';
+        const issue = classifyMpegTsPlaybackIssue(
+            createMpegTsPlaybackEvidence(
+                'NetworkError',
+                'HttpStatusCodeInvalid',
+                {
+                    code: 404,
+                    msg: `Not Found ${secret}`,
+                    url: `https://provider.example/error?token=${secret}`,
+                }
+            ),
+            METADATA
+        );
+
+        expect(issue).toEqual(
+            expect.objectContaining({
+                code: PlaybackDiagnosticCode.NetworkError,
+                httpStatus: 404,
+                mpegTs: expect.objectContaining({
+                    engineType: 'NetworkError',
+                    engineDetails: 'HttpStatusCodeInvalid',
+                    disposition: 'terminal',
+                    stage: 'loader',
+                    failure: 'http',
+                    httpStatus: 404,
+                }),
+                externalFallbackRecommended: false,
+            })
+        );
+        expect(issue.details).toBeUndefined();
+        expect(JSON.stringify(issue)).not.toContain(secret);
+    });
+});
diff --git a/libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.ts b/libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.ts
new file mode 100644
index 000000000..f816fcfab
--- /dev/null
+++ b/libs/ui/playback/src/lib/playback-diagnostics/mpegts-playback-evidence.util.ts
@@ -0,0 +1,167 @@
+import {
+    type MpegTsPlaybackEngineDetails as MpegTsPlaybackEngineDetailsValue,
+    type MpegTsPlaybackEngineType as MpegTsPlaybackEngineTypeValue,
+    type MpegTsPlaybackEvidence,
+    type MpegTsPlaybackFailure as MpegTsPlaybackFailureValue,
+    type MpegTsPlaybackStage as MpegTsPlaybackStageValue,
+    MpegTsPlaybackDisposition,
+    MpegTsPlaybackEngineDetails,
+    MpegTsPlaybackEngineType,
+    MpegTsPlaybackFailure,
+    MpegTsPlaybackStage,
+} from './mpegts-playback-evidence.model';
+
+export const MPEGTS_DIAGNOSTIC_VERSION = '1.8.0';
+
+interface MpegTsPlaybackCause {
+    readonly stage: MpegTsPlaybackStageValue;
+    readonly failure: MpegTsPlaybackFailureValue;
+}
+
+export function createMpegTsPlaybackEvidence(
+    type: unknown,
+    details: unknown,
+    info: unknown
+): MpegTsPlaybackEvidence {
+    const engineType = normalizeEngineType(type);
+    const engineDetails = normalizeEngineDetails(details);
+    const cause = deriveMpegTsPlaybackCause(engineType, engineDetails);
+    const httpStatus =
+        engineType === MpegTsPlaybackEngineType.Network &&
+        engineDetails ===
+            MpegTsPlaybackEngineDetails.HttpStatusCodeInvalid
+            ? readHttpStatus(info)
+            : undefined;
+
+    return {
+        engineType,
+        engineDetails,
+        disposition: MpegTsPlaybackDisposition.Terminal,
+        ...cause,
+        ...(httpStatus === undefined ? {} : { httpStatus }),
+    };
+}
+
+function normalizeEngineType(value: unknown): MpegTsPlaybackEngineTypeValue {
+    switch (value) {
+        case MpegTsPlaybackEngineType.Network:
+        case MpegTsPlaybackEngineType.Media:
+        case MpegTsPlaybackEngineType.Other:
+            return value;
+        default:
+            return MpegTsPlaybackEngineType.Unknown;
+    }
+}
+
+function normalizeEngineDetails(
+    value: unknown
+): MpegTsPlaybackEngineDetailsValue {
+    switch (value) {
+        case MpegTsPlaybackEngineDetails.NetworkException:
+        case MpegTsPlaybackEngineDetails.HttpStatusCodeInvalid:
+        case MpegTsPlaybackEngineDetails.ConnectingTimeout:
+        case MpegTsPlaybackEngineDetails.UnrecoverableEarlyEof:
+        case MpegTsPlaybackEngineDetails.MediaMseError:
+        case MpegTsPlaybackEngineDetails.FormatError:
+        case MpegTsPlaybackEngineDetails.FormatUnsupported:
+        case MpegTsPlaybackEngineDetails.CodecUnsupported:
+            return value;
+        default:
+            return MpegTsPlaybackEngineDetails.Unknown;
+    }
+}
+
+function deriveMpegTsPlaybackCause(
+    type: MpegTsPlaybackEngineTypeValue,
+    details: MpegTsPlaybackEngineDetailsValue
+): MpegTsPlaybackCause {
+    if (type === MpegTsPlaybackEngineType.Network) {
+        return deriveNetworkCause(details);
+    }
+    if (type === MpegTsPlaybackEngineType.Media) {
+        return deriveMediaCause(details);
+    }
+    return unknownCause();
+}
+
+function deriveNetworkCause(
+    details: MpegTsPlaybackEngineDetailsValue
+): MpegTsPlaybackCause {
+    switch (details) {
+        case MpegTsPlaybackEngineDetails.HttpStatusCodeInvalid:
+            return cause(
+                MpegTsPlaybackStage.Loader,
+                MpegTsPlaybackFailure.Http
+            );
+        case MpegTsPlaybackEngineDetails.ConnectingTimeout:
+            return cause(
+                MpegTsPlaybackStage.Loader,
+                MpegTsPlaybackFailure.Timeout
+            );
+        case MpegTsPlaybackEngineDetails.NetworkException:
+            return cause(
+                MpegTsPlaybackStage.Loader,
+                MpegTsPlaybackFailure.Network
+            );
+        case MpegTsPlaybackEngineDetails.UnrecoverableEarlyEof:
+            return cause(
+                MpegTsPlaybackStage.Loader,
+                MpegTsPlaybackFailure.TruncatedStream
+            );
+        default:
+            return unknownCause();
+    }
+}
+
+function deriveMediaCause(
+    details: MpegTsPlaybackEngineDetailsValue
+): MpegTsPlaybackCause {
+    switch (details) {
+        case MpegTsPlaybackEngineDetails.FormatError:
+        case MpegTsPlaybackEngineDetails.FormatUnsupported:
+            return cause(
+                MpegTsPlaybackStage.Demux,
+                MpegTsPlaybackFailure.Format
+            );
+        case MpegTsPlaybackEngineDetails.CodecUnsupported:
+            return cause(
+                MpegTsPlaybackStage.Demux,
+                MpegTsPlaybackFailure.Codec
+            );
+        case MpegTsPlaybackEngineDetails.MediaMseError:
+            return cause(
+                MpegTsPlaybackStage.MediaSource,
+                MpegTsPlaybackFailure.MediaSource
+            );
+        default:
+            return unknownCause();
+    }
+}
+
+function cause(
+    stage: MpegTsPlaybackStageValue,
+    failure: MpegTsPlaybackFailureValue
+): MpegTsPlaybackCause {
+    return { stage, failure };
+}
+
+function unknownCause(): MpegTsPlaybackCause {
+    return cause(
+        MpegTsPlaybackStage.Unknown,
+        MpegTsPlaybackFailure.Unknown
+    );
+}
+
+function readHttpStatus(info: unknown): number | undefined {
+    if (typeof info !== 'object' || info === null || Array.isArray(info)) {
+        return undefined;
+    }
+
+    const code = (info as Readonly<Record<string, unknown>>)['code'];
+    return typeof code === 'number' &&
+        Number.isInteger(code) &&
+        code >= 400 &&
+        code <= 599
+        ? code
+        : undefined;
+}
diff --git a/libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.model.ts b/libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.model.ts
index df9185068..31c3a94df 100644
--- a/libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.model.ts
+++ b/libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.model.ts
@@ -3,6 +3,9 @@ import type {
     ResolvedPortalPlayback,
 } from '@iptvnator/shared/interfaces';
 import type { ErrorDetails, ErrorTypes } from 'hls.js';
+import type { MpegTsPlaybackEvidence } from './mpegts-playback-evidence.model';
+
+export * from './mpegts-playback-evidence.model';
 
 export const PlaybackDiagnosticCode = {
     UnsupportedContainer: 'unsupported-container',
@@ -243,13 +246,6 @@ export interface ShakaPlaybackEvidence {
     readonly httpStatus?: number;
 }
 
-export interface MpegTsPlaybackErrorInput {
-    readonly type?: string;
-    readonly details?: string;
-    readonly message?: string;
-    readonly info?: unknown;
-}
-
 export interface PlaybackDiagnostic {
     readonly code: PlaybackDiagnosticCode;
     readonly source: PlaybackDiagnosticSource;
@@ -266,6 +262,7 @@ export interface PlaybackDiagnostic {
     readonly nativeErrorType?: string;
     readonly vhs?: VhsPlaybackEvidence;
     readonly hls?: HlsPlaybackEvidence;
+    readonly mpegTs?: MpegTsPlaybackEvidence;
     readonly shaka?: ShakaPlaybackEvidence;
     readonly externalFallbackRecommended: boolean;
 }
diff --git a/libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.util.spec.ts b/libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.util.spec.ts
index 535ad86ff..bda83e268 100644
--- a/libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.util.spec.ts
+++ b/libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.util.spec.ts
@@ -10,6 +10,7 @@ import {
     classifyHlsPlaybackIssue,
     classifyMpegTsPlaybackIssue,
     classifyNativePlaybackIssue,
+    createMpegTsPlaybackEvidence,
     createPlaybackSourceMetadata,
     getLikelyBrowserUnsupportedCodecLabels,
     getPlaybackMediaExtensionFromUrl,
@@ -584,13 +585,12 @@ describe('playback diagnostics', () => {
         expect(issue.externalFallbackRecommended).toBe(false);
     });
 
-    it('classifies mpegts browser fetch restrictions separately from generic network errors', () => {
+    it('does not guess mpegts browser access from exception messages', () => {
+        const secret = 'blocked by CORS policy';
         const issue = classifyMpegTsPlaybackIssue(
-            {
-                type: 'NetworkError',
-                details:
-                    'Fetch blocked by access-control policy while loading segment',
-            },
+            createMpegTsPlaybackEvidence('NetworkError', 'Exception', {
+                msg: secret,
+            }),
             createPlaybackSourceMetadata({
                 url: 'https://provider.example/live/channel.ts',
                 mimeType: 'video/mp2t',
@@ -598,17 +598,18 @@ describe('playback diagnostics', () => {
             })
         );
 
-        expect(issue.code).toBe('browser-access-error');
-        expect(issue.externalFallbackRecommended).toBe(true);
+        expect(issue.code).toBe(PlaybackDiagnosticCode.NetworkError);
+        expect(issue.externalFallbackRecommended).toBe(false);
+        expect(JSON.stringify(issue)).not.toContain(secret);
     });
 
     it('classifies mpegts early EOF failures as fallback-actionable media errors', () => {
         const issue = classifyMpegTsPlaybackIssue(
-            {
-                type: 'NetworkError',
-                details: 'UnrecoverableEarlyEof',
-                info: { msg: 'Fetch stream meet Early-EOF' },
-            },
+            createMpegTsPlaybackEvidence(
+                'NetworkError',
+                'UnrecoverableEarlyEof',
+                { msg: 'Fetch stream meet Early-EOF' }
+            ),
             createPlaybackSourceMetadata({
                 url: 'https://provider.example/movie/123.ts',
                 mimeType: 'video/mp2t',
@@ -618,15 +619,17 @@ describe('playback diagnostics', () => {
 
         expect(issue.code).toBe(PlaybackDiagnosticCode.MediaDecodeError);
         expect(issue.externalFallbackRecommended).toBe(true);
-        expect(issue.details).toContain('Early-EOF');
+        expect(issue.mpegTs?.failure).toBe('truncated-stream');
+        expect(issue.details).toBeUndefined();
     });
 
     it('classifies mpegts codec errors as unsupported codec fallbacks', () => {
         const issue = classifyMpegTsPlaybackIssue(
-            {
-                type: 'MediaError',
-                details: 'MediaCodecUnsupported',
-            },
+            createMpegTsPlaybackEvidence(
+                'MediaError',
+                'CodecUnsupported',
+                undefined
+            ),
             createPlaybackSourceMetadata({
                 url: 'https://example.com/live/channel.ts',
                 mimeType: 'video/mp2t',
diff --git a/libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.util.ts b/libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.util.ts
index 6e62f1bc5..c6c61aa53 100644
--- a/libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.util.ts
+++ b/libs/ui/playback/src/lib/playback-diagnostics/playback-diagnostics.util.ts
@@ -1,6 +1,6 @@
 import type {
     HlsPlaybackEvidence,
-    MpegTsPlaybackErrorInput,
+    MpegTsPlaybackEvidence,
     NativePlaybackErrorInput,
     PlaybackDiagnostic,
     PlaybackDiagnosticCode,
@@ -12,23 +12,23 @@ import type {
 } from './playback-diagnostics.model';
 import { PlaybackDiagnosticCode as DiagnosticCode } from './playback-diagnostics.model';
 import { HlsPlaybackDisposition } from './playback-diagnostics.model';
+import {
+    MpegTsPlaybackEngineDetails,
+    MpegTsPlaybackFailure,
+} from './mpegts-playback-evidence.model';
 import { PlaybackDiagnosticSource as DiagnosticSource } from './playback-diagnostics.model';
 import {
     VhsPlaybackEngineType,
     VhsPlaybackMediaErrorCode,
 } from './playback-diagnostics.model';
 import { getHlsPlaybackDiagnosticCode } from './hls-playback-evidence.util';
-import {
-    isBrowserAccessFailure,
-    isEarlyEofFailure,
-    isNetworkFailure,
-    normalizeErrorDetails,
-} from './playback-error-patterns.util';
+import { isBrowserAccessFailure } from './playback-error-patterns.util';
 import { isLikelyContainerIssue } from './playback-media-source.util';
 import { createVhsPlaybackEvidence } from './vhs-playback-evidence.util';
 
 export * from './playback-diagnostics.model';
 export { createHlsPlaybackEvidence } from './hls-playback-evidence.util';
+export { createMpegTsPlaybackEvidence } from './mpegts-playback-evidence.util';
 export { createVhsPlaybackEvidence } from './vhs-playback-evidence.util';
 export {
     createPlaybackSourceMetadata,
@@ -163,65 +163,15 @@ export function classifyHlsPlaybackIssue(
 }
 
 export function classifyMpegTsPlaybackIssue(
-    error: MpegTsPlaybackErrorInput,
+    evidence: MpegTsPlaybackEvidence,
     metadata: PlaybackSourceMetadata
 ): PlaybackDiagnostic {
-    const details = normalizeErrorDetails(error);
-    const lowerDetails = details.toLowerCase();
-    const lowerType = (error.type ?? '').toLowerCase();
-
-    if (isEarlyEofFailure(lowerDetails)) {
-        return createPlaybackDiagnostic({
-            code: DiagnosticCode.MediaDecodeError,
-            source: DiagnosticSource.MpegTs,
-            metadata,
-            details,
-        });
-    }
-
-    if (isNetworkFailure(lowerType, lowerDetails)) {
-        return createPlaybackDiagnostic({
-            code: isBrowserAccessFailure(lowerDetails)
-                ? DiagnosticCode.BrowserAccessError
-                : DiagnosticCode.NetworkError,
-            source: DiagnosticSource.MpegTs,
-            metadata,
-            details,
-        });
-    }
-
-    if (lowerDetails.includes('codec')) {
-        return createPlaybackDiagnostic({
-            code: DiagnosticCode.UnsupportedCodec,
-            source: DiagnosticSource.MpegTs,
-            metadata,
-            details,
-        });
-    }
-
-    if (lowerDetails.includes('format') || lowerDetails.includes('mse')) {
-        return createPlaybackDiagnostic({
-            code: DiagnosticCode.UnsupportedContainer,
-            source: DiagnosticSource.MpegTs,
-            metadata,
-            details,
-        });
-    }
-
-    if (lowerType.includes('media')) {
-        return createPlaybackDiagnostic({
-            code: DiagnosticCode.MediaDecodeError,
-            source: DiagnosticSource.MpegTs,
-            metadata,
-            details,
-        });
-    }
-
     return createPlaybackDiagnostic({
-        code: DiagnosticCode.UnknownPlaybackError,
+        code: getMpegTsPlaybackDiagnosticCode(evidence),
         source: DiagnosticSource.MpegTs,
         metadata,
-        details,
+        httpStatus: evidence.httpStatus,
+        mpegTs: evidence,
     });
 }
 
@@ -258,6 +208,7 @@ export function createPlaybackDiagnostic(options: {
     readonly nativeErrorType?: string;
     readonly vhs?: VhsPlaybackEvidence;
     readonly hls?: HlsPlaybackEvidence;
+    readonly mpegTs?: MpegTsPlaybackEvidence;
     readonly shaka?: ShakaPlaybackEvidence;
     /** Overrides the code-derived recommendation, e.g. when external players
      * are known to be unable to handle the stream either. */
@@ -274,6 +225,7 @@ export function createPlaybackDiagnostic(options: {
         nativeErrorType,
         vhs,
         hls,
+        mpegTs,
         shaka,
     } = options;
 
@@ -293,6 +245,7 @@ export function createPlaybackDiagnostic(options: {
         nativeErrorType,
         vhs,
         hls,
+        mpegTs,
         shaka,
         externalFallbackRecommended:
             options.externalFallbackRecommended ??
@@ -300,6 +253,29 @@ export function createPlaybackDiagnostic(options: {
     };
 }
 
+function getMpegTsPlaybackDiagnosticCode(
+    evidence: MpegTsPlaybackEvidence
+): PlaybackDiagnosticCode {
+    switch (evidence.failure) {
+        case MpegTsPlaybackFailure.Http:
+        case MpegTsPlaybackFailure.Timeout:
+        case MpegTsPlaybackFailure.Network:
+            return DiagnosticCode.NetworkError;
+        case MpegTsPlaybackFailure.TruncatedStream:
+        case MpegTsPlaybackFailure.MediaSource:
+            return DiagnosticCode.MediaDecodeError;
+        case MpegTsPlaybackFailure.Codec:
+            return DiagnosticCode.UnsupportedCodec;
+        case MpegTsPlaybackFailure.Format:
+            return evidence.engineDetails ===
+                MpegTsPlaybackEngineDetails.FormatUnsupported
+                ? DiagnosticCode.UnsupportedContainer
+                : DiagnosticCode.MediaDecodeError;
+        default:
+            return DiagnosticCode.UnknownPlaybackError;
+    }
+}
+
 function getVhsPlaybackDiagnosticCode(
     evidence: VhsPlaybackEvidence,
     metadata: PlaybackSourceMetadata
diff --git a/libs/ui/playback/src/lib/playback-diagnostics/playback-error-patterns.util.ts b/libs/ui/playback/src/lib/playback-diagnostics/playback-error-patterns.util.ts
index 996268692..cd2428fd4 100644
--- a/libs/ui/playback/src/lib/playback-diagnostics/playback-error-patterns.util.ts
+++ b/libs/ui/playback/src/lib/playback-diagnostics/playback-error-patterns.util.ts
@@ -1,25 +1,3 @@
-import type { MpegTsPlaybackErrorInput } from './playback-diagnostics.model';
-
-export function normalizeErrorDetails(
-    error: MpegTsPlaybackErrorInput
-): string {
-    const info = normalizeErrorPayload(error.info);
-
-    return [error.details, error.message, info]
-        .filter((part): part is string => Boolean(part))
-        .join(' ');
-}
-
-export function isNetworkFailure(type: string, details: string): boolean {
-    return (
-        type.includes('network') ||
-        details.includes('network') ||
-        details.includes('loaderror') ||
-        details.includes('timeout') ||
-        details.includes('status')
-    );
-}
-
 export function isBrowserAccessFailure(details: string): boolean {
     return (
         details.includes('cors') ||
@@ -38,53 +16,3 @@ export function isBrowserAccessFailure(details: string): boolean {
         details.includes('err_cleartext')
     );
 }
-
-export function isEarlyEofFailure(details: string): boolean {
-    const compactDetails = details.replace(/[^a-z0-9]/g, '');
-    return compactDetails.includes('earlyeof');
-}
-
-export function isCodecFailure(details: string): boolean {
-    return (
-        details.includes('codec') ||
-        details.includes('incompatiblecodecs') ||
-        details.includes('addcodec')
-    );
-}
-
-export function isDrmOrEncryptionFailure(details: string): boolean {
-    return (
-        details.includes('decrypt') ||
-        details.includes('keysystem') ||
-        details.includes('keyload') ||
-        details.includes('license') ||
-        details.includes('drm')
-    );
-}
-
-function normalizeErrorPayload(payload: unknown): string {
-    if (!payload) {
-        return '';
-    }
-
-    if (typeof payload === 'string') {
-        return payload;
-    }
-
-    if (payload instanceof Error) {
-        const extraDetails = stringifyUnknown(payload);
-        return [payload.message, extraDetails === '{}' ? '' : extraDetails]
-            .filter(Boolean)
-            .join(' ');
-    }
-
-    return stringifyUnknown(payload);
-}
-
-function stringifyUnknown(value: unknown): string {
-    try {
-        return JSON.stringify(value) || '';
-    } catch {
-        return String(value);
-    }
-}
diff --git a/libs/ui/playback/src/lib/vjs-player/vjs-mpegts-session.spec.ts b/libs/ui/playback/src/lib/vjs-player/vjs-mpegts-session.spec.ts
index d472e0e80..e8603a3ad 100644
--- a/libs/ui/playback/src/lib/vjs-player/vjs-mpegts-session.spec.ts
+++ b/libs/ui/playback/src/lib/vjs-player/vjs-mpegts-session.spec.ts
@@ -111,28 +111,68 @@ describe('VjsMpegTsSession', () => {
         expect(duration).toHaveBeenCalledWith(200);
     });
 
-    it('classifies engine errors with Video.js source metadata', () => {
+    it('emits structured HTTP evidence with Video.js source metadata', () => {
+        const mpegTsPlayer = createMpegTsPlayer();
+        createPlayerMock.mockReturnValue(mpegTsPlayer);
+        const video = document.createElement('video');
+        const { session, emitPlaybackIssue } = createSession();
+        const secret = 'vjs-mpegts-secret';
+
+        session.start('https://example.test/live/stream.ts', video);
+        mpegTsPlayer.emit(
+            'error',
+            'NetworkError',
+            'HttpStatusCodeInvalid',
+            {
+                code: 503,
+                msg: `Service Unavailable ${secret}`,
+                headers: { Authorization: secret },
+            }
+        );
+
+        expect(emitPlaybackIssue).toHaveBeenCalledWith(
+            expect.objectContaining({
+                code: 'network-error',
+                source: 'mpegts',
+                sourceUrl: 'https://example.test/live/stream.ts',
+                player: 'videojs',
+                httpStatus: 503,
+                mpegTs: expect.objectContaining({
+                    engineType: 'NetworkError',
+                    engineDetails: 'HttpStatusCodeInvalid',
+                    failure: 'http',
+                    httpStatus: 503,
+                }),
+                externalFallbackRecommended: false,
+            })
+        );
+        expect(JSON.stringify(emitPlaybackIssue.mock.calls)).not.toContain(
+            secret
+        );
+    });
+
+    it('does not guess browser access from a generic mpegts exception', () => {
         const mpegTsPlayer = createMpegTsPlayer();
         createPlayerMock.mockReturnValue(mpegTsPlayer);
         const video = document.createElement('video');
         const { session, emitPlaybackIssue } = createSession();
 
         session.start('https://example.test/live/stream.ts', video);
-        mpegTsPlayer.emit(
-            'error',
-            'NetworkError',
-            'FetchError',
-            new Error('CORS blocked')
-        );
+        mpegTsPlayer.emit('error', 'NetworkError', 'Exception', {
+            code: -1,
+            msg: 'blocked by CORS policy',
+        });
 
         expect(emitPlaybackIssue).toHaveBeenCalledWith(
             expect.objectContaining({
-                code: 'browser-access-error',
-                source: 'mpegts',
-                sourceUrl: 'https://example.test/live/stream.ts',
-                player: 'videojs',
+                code: 'network-error',
+                mpegTs: expect.objectContaining({ failure: 'network' }),
+                externalFallbackRecommended: false,
             })
         );
+        expect(JSON.stringify(emitPlaybackIssue.mock.calls)).not.toContain(
+            'CORS'
+        );
     });
 
     it('replaces an active session and removes listeners from the old video', () => {
diff --git a/libs/ui/playback/src/lib/vjs-player/vjs-mpegts-session.ts b/libs/ui/playback/src/lib/vjs-player/vjs-mpegts-session.ts
index 6ee7e4fc0..3e272eb0e 100644
--- a/libs/ui/playback/src/lib/vjs-player/vjs-mpegts-session.ts
+++ b/libs/ui/playback/src/lib/vjs-player/vjs-mpegts-session.ts
@@ -3,6 +3,7 @@ import {
     InlinePlaybackPlayer,
     type PlaybackDiagnostic,
     classifyMpegTsPlaybackIssue,
+    createMpegTsPlaybackEvidence,
     createPlaybackSourceMetadata,
     getPlaybackMediaExtensionFromUrl,
 } from '../playback-diagnostics/playback-diagnostics.util';
@@ -59,12 +60,7 @@ export class VjsMpegTsSession {
             this.syncDuration();
             this.config.emitPlaybackIssue(
                 classifyMpegTsPlaybackIssue(
-                    {
-                        type: typeof type === 'string' ? type : undefined,
-                        details:
-                            typeof details === 'string' ? details : undefined,
-                        info,
-                    },
+                    createMpegTsPlaybackEvidence(type, details, info),
                     createPlaybackSourceMetadata({
                         url,
                         mimeType: 'video/mp2t',
diff --git a/libs/ui/playback/src/lib/web-player-view/web-player-view-diagnostics.utils.ts b/libs/ui/playback/src/lib/web-player-view/web-player-view-diagnostics.utils.ts
index 08d536456..284ab8575 100644
--- a/libs/ui/playback/src/lib/web-player-view/web-player-view-diagnostics.utils.ts
+++ b/libs/ui/playback/src/lib/web-player-view/web-player-view-diagnostics.utils.ts
@@ -83,7 +83,7 @@ export function getDiagnosticDetails(
         {
             labelKey: 'PLAYBACK_DIAGNOSTICS.DETAIL_NATIVE_ERROR_MESSAGE',
             value:
-                issue.vhs || issue.shaka
+                issue.vhs || issue.mpegTs || issue.shaka
                     ? ''
                     : (issue.nativeErrorMessage ?? ''),
         },
@@ -95,6 +95,21 @@ export function getDiagnosticDetails(
 }
 
 function formatDiagnosticErrorDetails(issue: PlaybackDiagnostic): string {
+    if (issue.mpegTs) {
+        return [
+            `stage=${issue.mpegTs.stage}`,
+            `failure=${issue.mpegTs.failure}`,
+            `type=${issue.mpegTs.engineType}`,
+            `details=${issue.mpegTs.engineDetails}`,
+            `disposition=${issue.mpegTs.disposition}`,
+            issue.mpegTs.httpStatus === undefined
+                ? ''
+                : `HTTP ${issue.mpegTs.httpStatus}`,
+        ]
+            .filter((value) => value.length > 0)
+            .join(' · ');
+    }
+
     if (issue.shaka) {
         return [
             `stage=${issue.shaka.stage}`,
diff --git a/libs/ui/playback/src/lib/web-player-view/web-player-view.component.spec.ts b/libs/ui/playback/src/lib/web-player-view/web-player-view.component.spec.ts
index 8d550fb13..8c3eccb57 100644
--- a/libs/ui/playback/src/lib/web-player-view/web-player-view.component.spec.ts
+++ b/libs/ui/playback/src/lib/web-player-view/web-player-view.component.spec.ts
@@ -401,6 +401,37 @@ describe('WebPlayerViewComponent', () => {
         expect(renderedDetails).not.toContain('response body');
     });
 
+    it('renders only sanitized structured mpegts evidence in technical details', () => {
+        const issue = createStructuredMpegTsDiagnostic();
+
+        component.handlePlaybackIssue(issue);
+        fixture.detectChanges();
+
+        const details = component.getDiagnosticDetails(issue);
+        const renderedDetails = details.map(({ value }) => value).join(' ');
+
+        expect(component.getDiagnosticMeta(issue)).toBe('HTTP 404');
+        expect(details).toEqual(
+            expect.arrayContaining([
+                {
+                    labelKey: 'PLAYBACK_DIAGNOSTICS.DETAIL_SOURCE',
+                    value: 'mpegts.js',
+                },
+                {
+                    labelKey: 'PLAYBACK_DIAGNOSTICS.DETAIL_ERROR_DETAILS',
+                    value:
+                        'stage=loader · failure=http · type=NetworkError · ' +
+                        'details=HttpStatusCodeInvalid · ' +
+                        'disposition=terminal · HTTP 404',
+                },
+            ])
+        );
+        expect(renderedDetails).not.toContain('mpegts-render-secret');
+        expect(renderedDetails).not.toContain('provider.example');
+        expect(renderedDetails).not.toContain('Authorization');
+        expect(renderedDetails).not.toContain('response body');
+    });
+
     it('keeps query-declared HLS streams on the HLS mime type', () => {
         const streamUrl =
             'https://example.com/play?extension=m3u8&token=signed';
@@ -1038,3 +1069,30 @@ function createStructuredShakaDiagnostic(): PlaybackDiagnostic {
         externalFallbackRecommended: false,
     };
 }
+
+function createStructuredMpegTsDiagnostic(): PlaybackDiagnostic {
+    return {
+        code: PlaybackDiagnosticCode.NetworkError,
+        source: PlaybackDiagnosticSource.MpegTs,
+        sourceUrl:
+            'https://provider.example/live.ts?token=mpegts-render-secret',
+        container: 'ts',
+        mimeType: 'video/mp2t',
+        player: 'html5',
+        audioCodecs: [],
+        videoCodecs: [],
+        details: 'Authorization response body mpegts-render-secret',
+        nativeErrorMessage:
+            'https://provider.example/error?token=mpegts-render-secret',
+        httpStatus: 404,
+        mpegTs: {
+            engineType: 'NetworkError',
+            engineDetails: 'HttpStatusCodeInvalid',
+            disposition: 'terminal',
+            stage: 'loader',
+            failure: 'http',
+            httpStatus: 404,
+        },
+        externalFallbackRecommended: false,
+    };
+}