fix: improve plyr render for youtube video

packages/ui/src/custom/media-player/media-player.svelte

@@ -2,6 +2,7 @@
   import type { MediaPlayerOptions, VideoSource } from './types';
   import PlyrPlayer from './players/plyr-player.svelte';
   import MusePlayer from './players/muse-player.svelte';
+  import { formatYoutubeEmbedUrl } from './utils';
 
   interface Props {
     source: VideoSource;
@@ -26,11 +27,13 @@
   const tracks = $derived(source.tracks ?? []);
   const isMuse = $derived.by(() => source.type === 'muse' && source.metadata?.svid);
   const isGoogleDrive = $derived(source.type === 'google_drive');
+  const isYouTube = $derived(source.type === 'youtube');
   const poster = $derived(source.type === 'upload' ? source.metadata?.thumbnailUrl : undefined);
 
   const iframeTitle = $derived(source.metadata?.title?.trim() || 'Video');
   const iframeMaxHeight = $derived(options.maxHeight ?? '400px');
   const iframeWidth = $derived(options.width ?? '100%');
+  const youtubeEmbedUrl = $derived(isYouTube ? formatYoutubeEmbedUrl(source.url) : '');
 </script>
 
 <div class={className}>
@@ -51,6 +54,23 @@
         allowfullscreen
       ></iframe>
     </div>
+  {:else if isYouTube}
+    <!-- Native embed avoids Plyr's async noembed/setAspectRatio race on teardown. -->
+    <div
+      class="ui:relative ui:aspect-video ui:w-full ui:overflow-hidden ui:rounded-md"
+      style:max-height={iframeMaxHeight}
+      style:width={iframeWidth}
+      style:min-height={options.minHeight}
+      style:height={options.height}
+    >
+      <iframe
+        src={youtubeEmbedUrl}
+        title={iframeTitle}
+        class="ui:block ui:h-full ui:w-full ui:border-0"
+        allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"
+        allowfullscreen
+      ></iframe>
+    </div>
   {:else}
     <PlyrPlayer bind:this={plyrRef} src={source.url} {poster} hls={source.hls === true} {options} {tracks} />
   {/if}

packages/ui/src/custom/media-player/players/plyr-player.svelte

@@ -42,6 +42,8 @@
   let hlsPlyrGeneration = 0;
   let plyrConstructInFlight = false;
   let hasFiredFirstPlay = false;
+  let isMounted = false;
+  let youtubeInitGeneration = 0;
 
   interface HlsQualityConfig {
     default: number;
@@ -193,7 +195,7 @@
     try {
       // Recheck after the dynamic import resolves — the component may have
       // unmounted (or the videoElement bind nulled out) while we awaited.
-      if (!videoElement || playerInstance) return;
+      if (!isMounted || !videoElement || playerInstance) return;
 
       mediaErrorCleanup = attachMediaErrorHandler(videoElement);
 
@@ -257,23 +259,43 @@
     });
   }
 
+  async function constructPlyrForYouTubeEmbed(): Promise<void> {
+    if (!isMounted || !containerElement || !youtubeVideoId || playerInstance || plyrConstructInFlight) return;
+
+    const initGeneration = youtubeInitGeneration;
+    plyrConstructInFlight = true;
+
+    const PlyrModule = await import('plyr');
+    const PlyrConstructor = PlyrModule.default;
+    const controls = showControls ? PLYR_DEFAULT_CONTROLS : [];
+
+    try {
+      if (!isMounted || initGeneration !== youtubeInitGeneration || !containerElement || playerInstance) {
+        return;
+      }
+
+      playerInstance = new PlyrConstructor(containerElement, {
+        controls,
+        autoplay,
+        ratio: '16:9',
+        iconUrl: '/plyr.svg',
+        iconPrefix: 'plyr'
+      });
+      timeupdateCleanup = attachTimeUpdates(playerInstance);
+      firstPlayCleanup = attachFirstPlay(playerInstance);
+      plyrErrorCleanup = attachPlyrErrorHandler(playerInstance);
+      options.onPlayerReady?.(playerInstance);
+    } finally {
+      plyrConstructInFlight = false;
+    }
+  }
+
   onMount(() => {
+    isMounted = true;
+
     void (async () => {
       if (isYouTube && youtubeVideoId && containerElement) {
-        const PlyrModule = await import('plyr');
-        const PlyrConstructor = PlyrModule.default;
-        const controls = showControls ? PLYR_DEFAULT_CONTROLS : [];
-        playerInstance = new PlyrConstructor(containerElement, {
-          controls,
-          autoplay,
-          ratio: '16:9',
-          iconUrl: '/plyr.svg',
-          iconPrefix: 'plyr'
-        });
-        timeupdateCleanup = attachTimeUpdates(playerInstance);
-        firstPlayCleanup = attachFirstPlay(playerInstance);
-        plyrErrorCleanup = attachPlyrErrorHandler(playerInstance);
-        options.onPlayerReady?.(playerInstance);
+        await constructPlyrForYouTubeEmbed();
         return;
       }
 
@@ -448,6 +470,8 @@
   });
 
   onDestroy(() => {
+    isMounted = false;
+    youtubeInitGeneration += 1;
     hlsLoadGeneration += 1;
     hlsPlyrGeneration = 0;
     destroyHlsInstance();
@@ -463,6 +487,10 @@
     }
 
     teardownPlyrInstance();
+
+    if (isYouTube && containerElement) {
+      containerElement.replaceChildren();
+    }
   });
 </script>