Fix exception when getting 404 in video watch

client/src/app/videos/video-watch/video-watch.component.ts

@@ -66,11 +66,10 @@ export class VideoWatchComponent implements OnInit, OnDestroy {
   }
 
   ngOnDestroy () {
-    // Remove WebTorrent stuff
+    // Remove player if it exists
-    console.log('Removing video from webtorrent.')
+    if (this.videoNotFound === false) {
-
+      videojs(this.playerElement).dispose()
-    // Remove player
+    }
-    videojs(this.playerElement).dispose()
 
     // Unsubscribe subscriptions
     this.paramsSub.unsubscribe()