Update WE youtube link

Author: WCJ-BERT

public/WorldEngine/index.html

@@ -446,7 +446,7 @@
         <svg viewBox="0 0 24 24" fill="currentColor"><path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-1.5 14.5c-.55 0-1-.45-1-1s.45-1 1-1 1 .45 1 1-.45 1-1 1zm3 0c-.55 0-1-.45-1-1s.45-1 1-1 1 .45 1 1-.45 1-1 1zm2.5-5c0 1.1-.9 2-2 2h-4c-1.1 0-2-.9-2-2V9c0-1.1.9-2 2-2h4c1.1 0 2 .9 2 2v2.5z"/></svg>
         Dataset
       </a>
-      <a class="btn btn-outline" href="https://www.youtube.com/watch?v=YOUR_VIDEO_ID" target="_blank" rel="noopener">
+      <a class="btn btn-outline" href="https://www.youtube.com/watch?v=P1zEyfqa1uY" target="_blank" rel="noopener">
         <svg viewBox="0 0 24 24" fill="currentColor"><path d="M23.5 6.2a3 3 0 00-2.1-2.1C19.5 3.5 12 3.5 12 3.5s-7.5 0-9.4.6A3 3 0 00.5 6.2 31 31 0 000 12a31 31 0 00.5 5.8 3 3 0 002.1 2.1c1.9.6 9.4.6 9.4.6s7.5 0 9.4-.6a3 3 0 002.1-2.1A31 31 0 0024 12a31 31 0 00-.5-5.8zM9.7 15.5V8.5l6.3 3.5-6.3 3.5z"/></svg>
         YouTube
       </a>