Indicate that YouTube links are videos in clients page

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

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: jonathanhefner

docs/clients.mdx

@@ -827,7 +827,7 @@ Langflow is an open-source visual builder that lets developers rapidly prototype
 
 **Learn more:**
 
-- [Lutra AI agent explained](https://www.youtube.com/watch?v=W5ZpN0cMY70)
+- [Lutra AI agent explained (video)](https://www.youtube.com/watch?v=W5ZpN0cMY70)
 
 ### MCP Bundler for MacOS
 
@@ -843,7 +843,7 @@ Langflow is an open-source visual builder that lets developers rapidly prototype
 
 **Learn more:**
 
-- [MCP Bundler in action](https://www.youtube.com/watch?v=CEHVSShw_NU)
+- [MCP Bundler in action (video)](https://www.youtube.com/watch?v=CEHVSShw_NU)
 
 ### mcp-agent