Add frontend

frontend/src/app/app.ts

@@ -67,8 +67,11 @@ export class App implements OnInit {
         fluid: true,
         sources: [{
           src: `/api/videos/${videoId}/stream`,
-          type: 'video/x-msvideo' // AVI MIME type
+          type: 'video/mp4' // Use MP4 as it's widely supported
-        }]
+        }],
+        error: (error: Event) => {
+          console.error('Video.js error:', error);
+        }
       });
 
       this.#videoPlayers.set(videoId, player);