diff --git a/.changes/playback-native-container-routing.md b/.changes/playback-native-container-routing.md
new file mode 100644
index 000000000..a70f3312a
--- /dev/null
+++ b/.changes/playback-native-container-routing.md
@@ -0,0 +1,9 @@
+---
+type: fix
+area: playback
+---
+
+The built-in HTML5 player now plays `.mkv`, `.webm`, `.avi`, `.mov` and other
+non-HLS video files directly instead of handing them to the HLS engine, which
+failed with a "network or provider loading error" on many Xtream episodes and
+movies. ArtPlayer and the HTML5 player now choose their engine by the same rule.
diff --git a/CLAUDE.md b/CLAUDE.md
index 19a014fc8..8238f23a2 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -815,7 +815,14 @@ app as a real argument, so it is not an option.
 
 **Video Players**:
 
-- Built-in web players: HTML5+hls.js, Video.js, and ArtPlayer
+- Built-in web players: HTML5+hls.js, Video.js, and ArtPlayer. The HTML5
+  player and ArtPlayer pick their source engine from one URL rule,
+  `resolvePlaybackUrlSourceKind()` in `libs/playback/util` (`mpd` → Shaka,
+  `m3u8`/`m3u` → hls.js, `ts`/`m2ts`/extension-less → mpegts.js, every other
+  container → native `<video>`), so hls.js never receives an `.mkv`/`.webm`
+  file. The HTML5 native `<source>` carries a `video/mp4` hint only for
+  MP4-family files (`resolveNativeSourceMimeType`); a hint `canPlayType()`
+  rejects would make the browser skip the source.
 - mpegts.js `1.8.1` errors from all three built-in players cross one
   version-locked structured evidence boundary in `libs/playback/util`. It
   retains only exact public type/detail pairs, pair-derived stage/failure,
diff --git a/docs/architecture/embedded-inline-playback.md b/docs/architecture/embedded-inline-playback.md
index 27b64464b..537b89e90 100644
--- a/docs/architecture/embedded-inline-playback.md
+++ b/docs/architecture/embedded-inline-playback.md
@@ -635,12 +635,25 @@ video.
 
 URL extension metadata is filtered before diagnostics and player selection use it. Web script extensions such as `.php` are not shown as stream containers; explicit media query metadata such as `extension=ts` or `format=m3u8` is preferred when present.
 
+The HTML5 player and ArtPlayer choose their source engine from one URL rule,
+`resolvePlaybackUrlSourceKind()` in `@iptvnator/playback/util`, which maps the
+normalized media extension to `dash` (`mpd`), `hls` (`m3u8`/`m3u`), `mpegts`
+(`ts`, `m2ts`, and extension-less proxy/script URLs) or `native` (every other
+container: `mkv`, `webm`, `mp4`, `avi`, `mov`, `m4v`, audio files). hls.js
+therefore only ever receives HLS manifests; it used to be handed every
+unlisted container and raised a manifest error over media Chromium plays by
+itself. ArtPlayer serves the `native` kind through a single
+`ART_PLAYER_NATIVE_SOURCE_TYPE` custom type so `ArtPlayerSourceSession` keeps
+owning engine teardown and controls binding; the HTML5 player appends one
+`<source>` whose `video/mp4` MIME hint is set only for MP4-family files, since
+a hint the browser's `canPlayType()` rejects makes it skip the source
+(`resolveNativeSourceMimeType()`).
+
 MKV sources are attempted through Chromium's native Matroska path. Video.js
 receives `video/matroska` for `.mkv` URLs and explicit query metadata such as
-`extension=mkv` or `container=mkv`; ArtPlayer and HTML5 continue to use their
-native video paths. This is container support rather than a universal codec
-guarantee: native source or decode failures still produce a diagnostic whose
-ranked actions may include MPV/VLC.
+`extension=mkv` or `container=mkv`. This is container support rather than a
+universal codec guarantee: native source or decode failures still produce a
+diagnostic whose ranked actions may include MPV/VLC.
 
 Portal VOD and episode payloads with `contentInfo` are treated as non-live by the inline players unless `isLive` is explicitly set. If Chromium leaves the underlying MediaSource duration at `Infinity` for a finite TS VOD, the Video.js wrapper normalizes its UI duration from the finite `seekable` or `buffered` range. Embedded MPV uses the same live decision rule and shows an unknown duration placeholder for VOD/episode snapshots until MPV reports a finite duration. This removes the misleading `LIVE` control state without changing stream decoding, diagnostics, or external fallback behavior.
 
diff --git a/docs/architecture/m3u-playlist-module.md b/docs/architecture/m3u-playlist-module.md
index e2061bcfe..d9461e0a8 100644
--- a/docs/architecture/m3u-playlist-module.md
+++ b/docs/architecture/m3u-playlist-module.md
@@ -1037,8 +1037,9 @@ player in settings.
   because those players never receive its keys.
   Channels with `drm.supported === false` emit a `DrmOrEncryption` diagnostic
   with a fixed safe detail string and without starting an engine.
-- HTML5 player: `extension === 'mpd'` branch in `playChannel()`. ArtPlayer:
-  `customType.mpd` in `ArtPlayerSourceSession`. Shared-controls bridge:
+- HTML5 player: the `dash` branch of `playChannel()` (source kind from the
+  shared `resolvePlaybackUrlSourceKind()`). ArtPlayer: `customType.mpd` in
+  `ArtPlayerSourceSession`. Shared-controls bridge:
   `WebVideoControlsSource` kind `'shaka'` + `WebVideoShakaControls`
   (audio/text tracks via the Shaka 5 API — selecting a text track shows it,
   `selectTextTrack(null)` hides).
diff --git a/libs/playback/util/src/index.ts b/libs/playback/util/src/index.ts
index 14e312989..43c5078cb 100644
--- a/libs/playback/util/src/index.ts
+++ b/libs/playback/util/src/index.ts
@@ -6,4 +6,5 @@ export type * from './lib/diagnostics/shaka-error.types';
 export * from './lib/playback-recommendation.model';
 export * from './lib/playback-recommendation-policy';
 export * from './lib/playback-session-key';
+export * from './lib/playback-source-routing';
 export * from './lib/playback-target-capabilities';
diff --git a/libs/playback/util/src/lib/playback-source-routing.spec.ts b/libs/playback/util/src/lib/playback-source-routing.spec.ts
new file mode 100644
index 000000000..f15817777
--- /dev/null
+++ b/libs/playback/util/src/lib/playback-source-routing.spec.ts
@@ -0,0 +1,43 @@
+import { PlaybackSourceKind } from './playback-recommendation.model';
+import { resolvePlaybackUrlSourceKind } from './playback-source-routing';
+
+describe('resolvePlaybackUrlSourceKind', () => {
+    it.each([
+        ['https://example.test/live/playlist.m3u8', PlaybackSourceKind.Hls],
+        [
+            'https://example.test/live/playlist.M3U8?token=signed',
+            PlaybackSourceKind.Hls,
+        ],
+        ['https://example.test/live/list.m3u', PlaybackSourceKind.Hls],
+        ['https://example.test/play?format=hls', PlaybackSourceKind.Hls],
+        ['https://example.test/live.mpd', PlaybackSourceKind.Dash],
+        [
+            'https://example.test/stream.MPD?token=signed#frag',
+            PlaybackSourceKind.Dash,
+        ],
+        ['https://example.test/raw.ts', PlaybackSourceKind.MpegTs],
+        ['https://example.test/disc.m2ts', PlaybackSourceKind.MpegTs],
+        ['https://example.test/live/user/pass/1', PlaybackSourceKind.MpegTs],
+        ['https://example.test/live.php?id=7', PlaybackSourceKind.MpegTs],
+        ['https://example.test/play?ext=mpegts', PlaybackSourceKind.MpegTs],
+    ])('routes %s to the %s engine', (url, kind) => {
+        expect(resolvePlaybackUrlSourceKind(url)).toBe(kind);
+    });
+
+    it.each([
+        'https://example.test/movie/user/pass/2000000.mp4',
+        'https://example.test/series/user/pass/80000.mkv',
+        'https://example.test/movie.MKV?token=signed',
+        'https://example.test/play?extension=mkv',
+        'https://example.test/movie.webm',
+        'https://example.test/movie.avi',
+        'https://example.test/movie.mov',
+        'https://example.test/movie.m4v',
+        'https://example.test/track.mp3',
+        'https://example.test/movie.bin',
+    ])('hands the non-HLS container %s to the native element', (url) => {
+        expect(resolvePlaybackUrlSourceKind(url)).toBe(
+            PlaybackSourceKind.Native
+        );
+    });
+});
diff --git a/libs/playback/util/src/lib/playback-source-routing.ts b/libs/playback/util/src/lib/playback-source-routing.ts
new file mode 100644
index 000000000..3cef5f2eb
--- /dev/null
+++ b/libs/playback/util/src/lib/playback-source-routing.ts
@@ -0,0 +1,46 @@
+import { getPlaybackMediaExtensionFromUrl } from '@iptvnator/shared/m3u-utils';
+import { PlaybackSourceKind } from './playback-recommendation.model';
+
+/**
+ * Engine family a playback URL is routed to BEFORE any engine runs.
+ *
+ * `resolvePlaybackSourceKind()` answers the opposite question — which family
+ * a diagnostic came out of after an engine failed. Every built-in web player
+ * selects its source engine through this function, so the HTML5 player and
+ * ArtPlayer cannot disagree on what a URL is. A URL never yields `unknown`:
+ * an unrecognized container is exactly what the native `<video>` element is
+ * for.
+ */
+export type PlaybackUrlSourceKind = Exclude<
+    PlaybackSourceKind,
+    typeof PlaybackSourceKind.Unknown
+>;
+
+const DASH_MANIFEST_EXTENSION = 'mpd';
+const HLS_MANIFEST_EXTENSIONS: ReadonlySet<string> = new Set(['m3u', 'm3u8']);
+/**
+ * `.m2ts` (BDAV, 192-byte packets) rides with `.ts`: mpegts.js probes the
+ * packet size itself, so its `mpegts` player type covers both.
+ */
+const MPEG_TS_EXTENSIONS: ReadonlySet<string> = new Set(['ts', 'm2ts']);
+
+export function resolvePlaybackUrlSourceKind(
+    url: string
+): PlaybackUrlSourceKind {
+    const extension = getPlaybackMediaExtensionFromUrl(url);
+    if (extension === DASH_MANIFEST_EXTENSION) {
+        return PlaybackSourceKind.Dash;
+    }
+    if (HLS_MANIFEST_EXTENSIONS.has(extension)) {
+        return PlaybackSourceKind.Hls;
+    }
+    // Extension-less IPTV proxy/script URLs (`/live/user/pass/1`, `.php`)
+    // are predominantly raw MPEG-TS and keep the established engine.
+    if (!extension || MPEG_TS_EXTENSIONS.has(extension)) {
+        return PlaybackSourceKind.MpegTs;
+    }
+    // Every other container — mkv, webm, mp4, avi, mov, m4v, audio files —
+    // is handed to the browser. hls.js only ever receives HLS manifests: fed
+    // an .mkv it raised a manifest error over media Chromium plays natively.
+    return PlaybackSourceKind.Native;
+}
diff --git a/libs/ui/playback/src/lib/art-player/art-player-setup.spec.ts b/libs/ui/playback/src/lib/art-player/art-player-setup.spec.ts
index f2d5e17d2..d1b381751 100644
--- a/libs/ui/playback/src/lib/art-player/art-player-setup.spec.ts
+++ b/libs/ui/playback/src/lib/art-player/art-player-setup.spec.ts
@@ -1,4 +1,5 @@
 import {
+    ART_PLAYER_NATIVE_SOURCE_TYPE,
     buildArtPlayerChrome,
     exitOwnedArtPlayerFullscreen,
     getArtPlayerVideoType,
@@ -79,11 +80,25 @@ describe('ArtPlayer setup', () => {
                 'https://example.test/play?extension=m3u8&token=signed'
             )
         ).toBe('m3u8');
-        expect(getArtPlayerVideoType('https://example.test/movie.mkv')).toBe(
-            'video/matroska'
+        expect(getArtPlayerVideoType('https://example.test/disc.m2ts')).toBe(
+            'ts'
+        );
+        expect(getArtPlayerVideoType('https://example.test/list.m3u')).toBe(
+            'm3u8'
         );
     });
 
+    it.each(['mkv', 'webm', 'avi', 'mov', 'm4v', 'mp4'])(
+        'hands .%s files to the session-owned native type, never hls.js',
+        (extension) => {
+            expect(
+                getArtPlayerVideoType(
+                    `https://example.test/series/user/pass/80000.${extension}`
+                )
+            ).toBe(ART_PLAYER_NATIVE_SOURCE_TYPE);
+        }
+    );
+
     it('routes DASH manifests to the mpd custom type', () => {
         expect(getArtPlayerVideoType('https://example.test/live.mpd')).toBe(
             'mpd'
diff --git a/libs/ui/playback/src/lib/art-player/art-player-setup.ts b/libs/ui/playback/src/lib/art-player/art-player-setup.ts
index 45238494e..f3a0618f8 100644
--- a/libs/ui/playback/src/lib/art-player/art-player-setup.ts
+++ b/libs/ui/playback/src/lib/art-player/art-player-setup.ts
@@ -1,4 +1,17 @@
-import { getPlaybackMediaExtensionFromUrl } from '@iptvnator/playback/util';
+import {
+    PlaybackSourceKind,
+    getPlaybackMediaExtensionFromUrl,
+    resolvePlaybackUrlSourceKind,
+} from '@iptvnator/playback/util';
+
+/**
+ * ArtPlayer `type` under which every container that is not an HLS/DASH
+ * manifest or raw MPEG-TS (mkv, webm, mp4, avi, mov, m4v, …) reaches
+ * `ArtPlayerSourceSession`'s native path. One key keeps the session the owner
+ * of that source change (engine teardown plus controls binding) instead of
+ * ArtPlayer's bare `video.src` assignment for an unmatched type.
+ */
+export const ART_PLAYER_NATIVE_SOURCE_TYPE = 'native';
 
 /**
  * ArtPlayer option overrides for the legacy and shared-control surfaces.
@@ -67,23 +80,21 @@ export function resolveArtPlayerIsLive(
     return extension === 'm3u8' || extension === 'ts' || !extension;
 }
 
+/**
+ * Maps the shared URL routing decision onto the `customType` keys served by
+ * `ArtPlayerSourceSession`, so ArtPlayer and the HTML5 player always pick the
+ * same engine for a URL.
+ */
 export function getArtPlayerVideoType(url: string): string {
-    const extension = getPlaybackMediaExtensionFromUrl(url);
-    switch (extension) {
-        case 'mkv':
-            return 'video/matroska';
-        case 'm3u8':
-            return 'm3u8';
-        case 'mp4':
-            return 'mp4';
-        case 'mpd':
+    switch (resolvePlaybackUrlSourceKind(url)) {
+        case PlaybackSourceKind.Dash:
             return 'mpd';
-        case 'ts':
+        case PlaybackSourceKind.Hls:
+            return 'm3u8';
+        case PlaybackSourceKind.MpegTs:
             return 'ts';
         default:
-            // Extensionless IPTV proxy/script URLs are predominantly raw
-            // MPEG-TS and retain the established ArtPlayer fallback.
-            return extension ? 'auto' : 'ts';
+            return ART_PLAYER_NATIVE_SOURCE_TYPE;
     }
 }
 
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 226c05daa..1f27fff21 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
@@ -23,6 +23,7 @@ import {
 } from '../web-video-support/web-video-source-controls.bridge';
 import { WebVideoSourceTracks } from '../web-video-support/web-video-source-tracks';
 import { addHlsAudioTrackSettings } from './art-player-audio-tracks';
+import { ART_PLAYER_NATIVE_SOURCE_TYPE } from './art-player-setup';
 
 export interface ArtPlayerSourceSessionConfig {
     sharedControls: boolean;
@@ -48,7 +49,8 @@ export class ArtPlayerSourceSession {
         m3u8: (video, url, art) => this.startHls(video, url, art),
         mpd: (video, url) => this.startDash(video, url),
         ts: (video, url) => this.startMpegTs(video, url),
-        'video/matroska': (video, url) => this.startNative(video, url),
+        [ART_PLAYER_NATIVE_SOURCE_TYPE]: (video, url) =>
+            this.startNative(video, url),
     };
 
     private player: Artplayer | null = null;
diff --git a/libs/ui/playback/src/lib/art-player/art-player.component.spec-fixtures.ts b/libs/ui/playback/src/lib/art-player/art-player.component.spec-fixtures.ts
index c99baad44..75d1f1926 100644
--- a/libs/ui/playback/src/lib/art-player/art-player.component.spec-fixtures.ts
+++ b/libs/ui/playback/src/lib/art-player/art-player.component.spec-fixtures.ts
@@ -101,7 +101,7 @@ export function resetArtPlayerSpecFixtures(): void {
 }
 
 export function getCustomType(
-    type: 'm3u8' | 'ts' | 'mkv'
+    type: 'm3u8' | 'mpd' | 'ts' | 'native'
 ): (video: HTMLVideoElement, url: string) => void {
     const customType = (
         artPlayerInstances[0].options['customType'] as Record<
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 5deeda309..2c23c5568 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
@@ -81,7 +81,13 @@ describe('ArtPlayerComponent', () => {
             },
         });
 
-        getCustomType('video/matroska')(
+        // The mkv channel must reach the session's native custom type: an
+        // unregistered `type` would fall to ArtPlayer's bare `video.src`.
+        expect(artPlayerInstances[0].options['type']).toBe('native');
+        expect(
+            Object.keys(artPlayerInstances[0].options['customType'] as object)
+        ).toContain('native');
+        getCustomType('native')(
             artPlayerInstances[0].video,
             'https://example.com/archive/movie.mkv'
         );
diff --git a/libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.spec.ts b/libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.spec.ts
index bfb34160b..c12b9ea11 100644
--- a/libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.spec.ts
+++ b/libs/ui/playback/src/lib/html-video-player/html-video-player.component.shared-controls.spec.ts
@@ -7,8 +7,14 @@ import { PictureInPictureTestEnvironment } from '../player-controls/picture-in-p
 import { SeriesPlaybackNavigationControlsComponent } from '../portal-inline-player/series-playback-navigation-controls.component';
 import type { HtmlVideoPlayerComponent as HtmlVideoPlayerComponentInstance } from './html-video-player.component';
 import {
+    TEST_CHANNEL,
     cleanupSharedControlsTests,
     configureSharedControlsTests,
+    hlsInstances,
+    mpegTsInstances,
+    mpegTsIsSupported,
+    observeBridgeSourceBinding,
+    readHtmlPlayerInternals,
     renderSharedControls,
     renderSharedControlsDefaults,
     type SharedControlsFixture,
@@ -284,6 +290,43 @@ describe('HtmlVideoPlayerComponent shared controls host', () => {
 
         expect(tracks[0].mode).toBe('showing');
     });
+
+    it.each([
+        ['mkv', null],
+        ['webm', null],
+        ['avi', null],
+        ['mov', null],
+        ['m4v', 'video/mp4'],
+    ])(
+        'plays a .%s file through the native element instead of hls.js',
+        (extension, mimeHint) => {
+            // Both MSE engines report support, so a native pick is routing,
+            // not a fallback.
+            mpegTsIsSupported.mockReturnValue(true);
+            const { component, fixture } = renderSharedControls(
+                HtmlVideoPlayerComponent,
+                fixtures,
+                { isLive: false }
+            );
+            const setSource = observeBridgeSourceBinding(component);
+            const video = fixture.debugElement.query(By.css('video'))
+                .nativeElement as HTMLVideoElement;
+            const url = `https://example.test/series/user/pass/80000.${extension}`;
+
+            component.playChannel({ ...TEST_CHANNEL, url });
+
+            const internals = readHtmlPlayerInternals(component);
+            expect(hlsInstances).toHaveLength(0);
+            expect(mpegTsInstances).toHaveLength(0);
+            expect(internals.hls).toBeNull();
+            expect(internals.mpegtsPlayer).toBeNull();
+            expect(setSource).toHaveBeenCalledWith({ kind: 'native' });
+            expect(internals.controlsSource).toEqual({ kind: 'native' });
+            const sources = Array.from(video.querySelectorAll('source'));
+            expect(sources.map((source) => source.src)).toEqual([url]);
+            expect(sources[0]?.getAttribute('type')).toBe(mimeHint);
+        }
+    );
 });
 
 function restoreDocumentProperty(
diff --git a/libs/ui/playback/src/lib/html-video-player/html-video-player.component.ts b/libs/ui/playback/src/lib/html-video-player/html-video-player.component.ts
index 075198964..a58333c4a 100644
--- a/libs/ui/playback/src/lib/html-video-player/html-video-player.component.ts
+++ b/libs/ui/playback/src/lib/html-video-player/html-video-player.component.ts
@@ -20,7 +20,8 @@ import { Channel, createDevLogger } from '@iptvnator/shared/interfaces';
 import {
     InlinePlaybackPlayer,
     PlaybackDiagnostic,
-    getPlaybackMediaExtensionFromUrl,
+    PlaybackSourceKind,
+    resolvePlaybackUrlSourceKind,
 } from '@iptvnator/playback/util';
 import {
     type LegacyPlayerShortcuts,
@@ -35,6 +36,7 @@ import { ShakaVideoSession } from '../shaka-engine/shaka-video-session';
 import { exitOwnedFullscreen } from '../web-video-support/exit-owned-fullscreen.util';
 import {
     clearNativeVideoSources,
+    resolveNativeSourceMimeType,
     setNativeVideoSource,
 } from '../web-video-support/web-video-native-source.util';
 import { WebVideoSourceTracks } from '../web-video-support/web-video-source-tracks';
@@ -197,7 +199,7 @@ export class HtmlVideoPlayerComponent implements OnInit, OnChanges, OnDestroy {
         if (channel.url) {
             this.playbackIssue.emit(null);
             const url = channel.url + (channel.epgParams ?? '');
-            const extension = getPlaybackMediaExtensionFromUrl(channel.url);
+            const sourceKind = resolvePlaybackUrlSourceKind(channel.url);
 
             // The scoped Electron header override is owned by
             // WebPlayerViewComponent, which configures the full header set
@@ -205,7 +207,7 @@ export class HtmlVideoPlayerComponent implements OnInit, OnChanges, OnDestroy {
             // receives the channel. Re-issuing the three-header call here
             // would overwrite that richer override.
 
-            if (extension === 'mpd') {
+            if (sourceKind === PlaybackSourceKind.Dash) {
                 debugHtmlPlayer(
                     'Using Shaka Player for DASH stream:',
                     channel.name,
@@ -227,7 +229,7 @@ export class HtmlVideoPlayerComponent implements OnInit, OnChanges, OnDestroy {
                     this.handlePlayOperation();
                 }
             } else if (
-                (extension === 'ts' || !extension) &&
+                sourceKind === PlaybackSourceKind.MpegTs &&
                 mpegts.isSupported()
             ) {
                 debugHtmlPlayer(
@@ -257,11 +259,14 @@ export class HtmlVideoPlayerComponent implements OnInit, OnChanges, OnDestroy {
                 this.mpegtsPlayer.load();
                 this.handlePlayOperation();
             } else if (
-                extension !== 'mp4' &&
-                extension !== 'mpv' &&
+                sourceKind !== PlaybackSourceKind.Native &&
                 Hls &&
                 Hls.isSupported()
             ) {
+                // HLS manifests, plus raw MPEG-TS when mpegts.js is
+                // unavailable (the historical engine order). Native
+                // containers never reach hls.js: fed an .mkv it raised a
+                // manifest error over media the browser plays by itself.
                 debugHtmlPlayer('Starting HLS playback');
                 const hls = new Hls();
                 this.hls = hls;
@@ -280,7 +285,7 @@ export class HtmlVideoPlayerComponent implements OnInit, OnChanges, OnDestroy {
                 setNativeVideoSource(
                     this.videoPlayer.nativeElement,
                     url,
-                    'video/mp4'
+                    resolveNativeSourceMimeType(channel.url)
                 );
                 this.bindControlsSource({ kind: 'native' });
                 this.videoPlayer.nativeElement.load();
diff --git a/libs/ui/playback/src/lib/web-video-support/web-video-native-source.util.ts b/libs/ui/playback/src/lib/web-video-support/web-video-native-source.util.ts
index df2c31d16..656e0b143 100644
--- a/libs/ui/playback/src/lib/web-video-support/web-video-native-source.util.ts
+++ b/libs/ui/playback/src/lib/web-video-support/web-video-native-source.util.ts
@@ -1,10 +1,28 @@
+import { getPlaybackMediaExtensionFromUrl } from '@iptvnator/playback/util';
+
 /** Helpers for driving the native `<video>` element source list. */
 
+const MP4_FAMILY_EXTENSIONS: ReadonlySet<string> = new Set(['mp4', 'm4v']);
+
 export function clearNativeVideoSources(element: HTMLVideoElement): void {
     element.removeAttribute('src');
     element.replaceChildren();
 }
 
+/**
+ * MIME hint for a native `<source>`, given only to MP4-family files.
+ *
+ * The hint is a filter, not a description: the browser skips a `<source>`
+ * whose type its `canPlayType()` rejects, and a container it demuxes (mkv,
+ * webm, mov, avi) is not necessarily one it advertises there. Those sources
+ * stay unhinted so the browser sniffs the bytes instead.
+ */
+export function resolveNativeSourceMimeType(url: string): string | undefined {
+    return MP4_FAMILY_EXTENSIONS.has(getPlaybackMediaExtensionFromUrl(url))
+        ? 'video/mp4'
+        : undefined;
+}
+
 /**
  * Replaces the element's sources with a single `<source>` without loading it;
  * callers bind their controls source first, then call `element.load()`.
@@ -12,11 +30,13 @@ export function clearNativeVideoSources(element: HTMLVideoElement): void {
 export function setNativeVideoSource(
     element: HTMLVideoElement,
     url: string,
-    type: string
+    type?: string
 ): void {
     clearNativeVideoSources(element);
     const source = document.createElement('source');
     source.src = url;
-    source.type = type;
+    if (type) {
+        source.type = type;
+    }
     element.appendChild(source);
 }