Add YouTube demo video link to app footer

- Added "Watch the Demo" section with YouTube video link
- Updated footer with author name and proper links
- All links now point to correct GitHub and HF Space URLs

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

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

app.py

@@ -1288,9 +1288,15 @@ with gr.Blocks(
 
     ---
 
-    Built with Gradio for the **Gradio Agents & MCP Hackathon - Winter 2025**
+    ### 🎥 Watch the Demo
 
-    [GitHub](https://github.com) | [Documentation](USER_GUIDE.md) | [HuggingFace](https://huggingface.co)
+    See all features in action: [YouTube Demo Video (2:30)](https://youtu.be/U4Dfc7txa_0)
+
+    ---
+
+    Built with Gradio for the **Gradio Agents & MCP Hackathon - Winter 2025** by [Aaman Lamba](https://aamanlamba.com)
+
+    [GitHub](https://github.com/aamanlamba/lineage-graph-accelerator) | [Documentation](https://huggingface.co/spaces/aamanlamba/Lineage-graph-accelerator/blob/main/USER_GUIDE.md) | [HuggingFace Space](https://huggingface.co/spaces/aamanlamba/Lineage-graph-accelerator)
     """)
 
 # Launch