chore: update default project index html to youtube channel and be lp edit friendly

Author: abose

src/assets/default-project/en/index.html

@@ -17,16 +17,17 @@ <h1>Phoenix Code</h1>
             </div>
             <div class="video-container">
                 <a
-                    href="https://www.youtube.com/watch?feature=player_embedded&v=Jkg3nAZ6vF8"
+                    href="https://www.youtube.com/@phoenixcodeeditor3764"
                     target="_blank"
-                    title="Phoenix YouTube Channel">
+                    title="Phoenix YouTube Channel"
+                    class="phcode-no-lp-edit">
                     <img
                         src="images/youtube_video.png"
                         alt="Phoenix Code on YouTube"
                         title="Phoenix Code on YouTube"
                         style="max-width: 320px" />
                 </a>
-                <img src="images/play.svg" class="play-button" style="width: 64px;" alt="play">
+                <img src="images/play.svg" class="play-button phcode-no-lp-edit" style="width: 64px;" alt="play">
             </div>
         </div>
         <img id="cloudLeftTop" alt="cloud" src="images/vector-top-left.png" />