Update default YouTube URL to new video

Changed the default video URL from HixGrIOBE0U to EBwD0RPO1IM in the web interface.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

templates/index.html

@@ -278,7 +278,7 @@
             <div class="section">
                 <div class="input-group">
                     <label for="url">URL de la vidéo YouTube</label>
-                    <input type="text" id="url" placeholder="https://www.youtube.com/watch?v=..." value="https://www.youtube.com/watch?v=HixGrIOBE0U">
+                    <input type="text" id="url" placeholder="https://www.youtube.com/watch?v=..." value="https://www.youtube.com/watch?v=EBwD0RPO1IM">
                 </div>
                 <button class="btn btn-primary" id="analyzeBtn" onclick="analyzeVideo()">
                     🔍 Analyser la vidéo