youtobe video added

lib/embedUrl.ts

@@ -0,0 +1,22 @@
+
+export function toEmbedUrl(url: string): string {
+  let videoId = '';
+
+  // watch?v=...
+  if (url.includes('watch?v=')) {
+    const params = new URL(url).searchParams;
+    videoId = params.get('v') || '';
+  }
+  // youtu.be/...
+  else if (url.includes('youtu.be/')) {
+    const pathname = new URL(url).pathname; // /videoId
+    videoId = pathname.split('/')[1] || '';
+  }
+  // shorts/...
+  else if (url.includes('youtube.com/shorts/')) {
+    const pathname = new URL(url).pathname; // /shorts/videoId
+    videoId = pathname.split('/')[2] || '';
+  }
+
+  return videoId ? `https://www.youtube.com/embed/${videoId}` : '';
+}