diff --git a/libs/ui/playback/src/lib/art-player/art-player.component.ts b/libs/ui/playback/src/lib/art-player/art-player.component.ts
index ef9cbf359..5168e27b4 100644
--- a/libs/ui/playback/src/lib/art-player/art-player.component.ts
+++ b/libs/ui/playback/src/lib/art-player/art-player.component.ts
@@ -279,6 +279,7 @@ export class ArtPlayerComponent implements OnInit, OnDestroy, OnChanges {
                     details: data.details,
                     fatal: data.fatal,
                     message: data.error?.message,
+                    error: data.error,
                 },
                 this.createSourceMetadata(url, 'application/x-mpegURL')
             )
diff --git a/libs/ui/playback/src/lib/html-video-player/html-video-player.component.spec.ts b/libs/ui/playback/src/lib/html-video-player/html-video-player.component.spec.ts
index b95cbcc27..da1d25328 100644
--- a/libs/ui/playback/src/lib/html-video-player/html-video-player.component.spec.ts
+++ b/libs/ui/playback/src/lib/html-video-player/html-video-player.component.spec.ts
@@ -109,4 +109,36 @@ describe('HtmlVideoPlayerComponent', () => {
 
         expect(issues).toEqual([]);
     });
+
+    it('keeps raw HLS error object context in emitted playback issue details', () => {
+        const issues: Array<{ details?: string }> = [];
+        component.playbackIssue.subscribe((issue) => {
+            if (issue) issues.push(issue);
+        });
+
+        (
+            component as unknown as {
+                handleHlsError: (
+                    url: string,
+                    data: {
+                        type: string;
+                        details: string;
+                        fatal: boolean;
+                        error?: unknown;
+                    }
+                ) => void;
+            }
+        ).handleHlsError('https://example.com/live/playlist.m3u8', {
+            type: 'networkError',
+            details: 'manifestLoadError',
+            fatal: true,
+            error: {
+                context: 'xhr setup failed',
+                status: 0,
+            },
+        });
+
+        expect(issues[0].details).toContain('xhr setup failed');
+        expect(issues[0].details).toContain('"status":0');
+    });
 });
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 0ce93d9f1..099bd8e1e 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
@@ -288,6 +288,7 @@ export class HtmlVideoPlayerComponent implements OnInit, OnChanges, OnDestroy {
                     details: data.details,
                     fatal: data.fatal,
                     message: data.error?.message,
+                    error: data.error,
                 },
                 this.createSourceMetadata(url, 'application/x-mpegURL')
             )
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 6fcbf71cd..d368b63c4 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
@@ -74,6 +74,20 @@ describe('playback diagnostics', () => {
         expect(unsupportedSourceIssue.externalFallbackRecommended).toBe(true);
     });
 
+    it('classifies MIME-only unsupported containers as container diagnostics', () => {
+        const issue = classifyNativePlaybackIssue(
+            { code: 4, message: 'source not supported' },
+            createPlaybackSourceMetadata({
+                url: 'https://example.com/archive/stream',
+                mimeType: 'video/x-msvideo',
+                player: 'html5',
+            })
+        );
+
+        expect(issue.code).toBe(PlaybackDiagnosticCode.UnsupportedContainer);
+        expect(issue.container).toBe('x-msvideo');
+    });
+
     it('classifies HLS network errors without claiming codec incompatibility', () => {
         const issue = classifyHlsPlaybackIssue(
             {
@@ -91,6 +105,44 @@ describe('playback diagnostics', () => {
         expect(issue.externalFallbackRecommended).toBe(false);
     });
 
+    it('does not treat provider-side blocked messages as browser access errors', () => {
+        const issue = classifyHlsPlaybackIssue(
+            {
+                type: 'networkError',
+                details: 'manifestLoadError Request blocked by rate limiter',
+                fatal: true,
+            },
+            createPlaybackSourceMetadata({
+                url: 'https://provider.example/live/index.m3u8',
+                player: 'videojs',
+            })
+        );
+
+        expect(issue.code).toBe(PlaybackDiagnosticCode.NetworkError);
+        expect(issue.externalFallbackRecommended).toBe(false);
+    });
+
+    it('keeps raw HLS error object context in diagnostic details', () => {
+        const issue = classifyHlsPlaybackIssue(
+            {
+                type: 'networkError',
+                details: 'manifestLoadError',
+                fatal: true,
+                error: {
+                    context: 'xhr setup failed',
+                    status: 0,
+                },
+            },
+            createPlaybackSourceMetadata({
+                url: 'https://provider.example/live/index.m3u8',
+                player: 'videojs',
+            })
+        );
+
+        expect(issue.details).toContain('xhr setup failed');
+        expect(issue.details).toContain('"status":0');
+    });
+
     it('classifies HLS browser access blocks separately from provider network failures', () => {
         const issue = classifyHlsPlaybackIssue(
             {
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 104c37822..84ca939d0 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
@@ -115,6 +115,15 @@ const UNSUPPORTED_CONTAINER_EXTENSIONS = new Set([
     'wmv',
 ]);
 
+const UNSUPPORTED_CONTAINER_NAMES = new Set([
+    ...UNSUPPORTED_CONTAINER_EXTENSIONS,
+    'matroska',
+    'mp2t',
+    'quicktime',
+    'x-matroska',
+    'x-msvideo',
+]);
+
 const DECLARED_MEDIA_EXTENSION_QUERY_KEYS = [
     'extension',
     'ext',
@@ -525,7 +534,8 @@ function inferContainerFromMimeType(mimeType: string | undefined): string {
 
 function isLikelyContainerIssue(metadata: PlaybackSourceMetadata): boolean {
     return (
-        UNSUPPORTED_CONTAINER_EXTENSIONS.has(metadata.extension) ||
+        UNSUPPORTED_CONTAINER_NAMES.has(metadata.extension) ||
+        UNSUPPORTED_CONTAINER_NAMES.has(metadata.container) ||
         metadata.mimeType === 'video/matroska'
     );
 }
@@ -535,24 +545,41 @@ function normalizeErrorDetails(
 ): string {
     const hlsError = 'error' in error ? error.error : undefined;
     const mpegTsInfo = 'info' in error ? error.info : undefined;
-    const errorMessage =
-        hlsError instanceof Error
-            ? hlsError.message
-            : typeof hlsError === 'string'
-              ? hlsError
-              : '';
-    const info =
-        typeof mpegTsInfo === 'string'
-            ? mpegTsInfo
-            : mpegTsInfo
-              ? JSON.stringify(mpegTsInfo)
-              : '';
+    const errorMessage = normalizeErrorPayload(hlsError);
+    const info = normalizeErrorPayload(mpegTsInfo);
 
     return [error.details, error.message, errorMessage, info]
         .filter((part): part is string => Boolean(part))
         .join(' ');
 }
 
+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);
+    }
+}
+
 function isNetworkFailure(type: string, details: string): boolean {
     return (
         type.includes('network') ||
@@ -573,8 +600,9 @@ function isBrowserAccessFailure(details: string): boolean {
         details.includes('content security policy') ||
         details.includes('mixed content') ||
         details.includes('private network access') ||
-        details.includes('blocked by') ||
-        details.includes('has been blocked') ||
+        details.includes('blocked by content security') ||
+        details.includes('blocked by cors') ||
+        details.includes('blocked by mixed content') ||
         details.includes('not allowed to load local resource') ||
         details.includes('err_blocked') ||
         details.includes('err_cleartext')