docs: add video demo to README.md

Added a link to a GitHub resource in the README.

Author: tylerslaton

README.md

@@ -2,6 +2,8 @@
 
 This is a starter template for building AI agents using [LangGraph](https://www.langchain.com/langgraph) and [CopilotKit](https://copilotkit.ai). It provides a modern Next.js application with an integrated LangGraph agent to be built on top of.
 
+https://github.com/user-attachments/assets/47761912-d46a-4fb3-b9bd-cb41ddd02e34
+
 ## Prerequisites
 
 - Node.js 18+ 
@@ -104,4 +106,4 @@ If you see "I'm having trouble connecting to my tools", make sure:
 If you encounter Python import errors:
 ```bash
 npm install:agent
-```
+```