Handle video play() promise rejection with visible error state (closes #23)

src/components/VideoPlayer.tsx

@@ -13,6 +13,7 @@ const VideoPlayer = ({ src, poster, vttSrc }: VideoPlayerProps) => {
   const [showCaptions, setShowCaptions] = useState(false)
   const [playbackRate, setPlaybackRate] = useState(1)
   const [progress, setProgress] = useState(0)
+  const [playError, setPlayError] = useState(false)
   const videoRef = useRef<HTMLVideoElement>(null)
   const timeoutRef = useRef<ReturnType<typeof setTimeout>>(null)
   
@@ -39,16 +40,23 @@ const VideoPlayer = ({ src, poster, vttSrc }: VideoPlayerProps) => {
     }, 3000)
   }, [isPlaying])
 
-  const togglePlay = useCallback(() => {
+  const togglePlay = useCallback(async () => {
     if (videoRef.current) {
       if (isPlaying) {
         videoRef.current.pause()
         setShowControls(true)
+        setIsPlaying(false)
       } else {
-        videoRef.current.play()
+        try {
+          await videoRef.current.play()
+          setPlayError(false)
+          setIsPlaying(true)
           hideControlsWithDelay()
+        } catch {
+          setIsPlaying(false)
+          setPlayError(true)
+        }
       }
-      setIsPlaying(!isPlaying)
     }
   }, [isPlaying, hideControlsWithDelay])
 
@@ -133,6 +141,14 @@ const VideoPlayer = ({ src, poster, vttSrc }: VideoPlayerProps) => {
         />
       </video>
 
+      {playError && (
+        <div className="absolute inset-0 flex items-center justify-center bg-black/70">
+          <p className="text-white text-sm font-medium px-4 py-2 bg-red-700/80 rounded">
+            Video unavailable — please try again later.
+          </p>
+        </div>
+      )}
+
       <div
         className={`absolute bottom-0 left-0 right-0 transition-opacity duration-300 ${
           showControls ? 'opacity-100' : 'opacity-0'