add video

docs/.vitepress/theme/components/YouTube.vue

@@ -36,8 +36,8 @@ const iframe = useTemplateRef("iframe");
 
 onMounted(() => {
   const { YT } = window as any;
-  if (YT?.Player) {
-    player.value = new YT.Player("yt-player");
+  if (YT?.Player && iframe.value) {
+    player.value = new YT.Player(iframe.value);
   }
 });