Update README.md

README.md

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 AgentFlow Planner Agent 7B checkpoint (built upon Qwen2.5-7B-Instruct):
 
-- Arxiv: https://arxiv.org/abs/2510.05592  
-- HF Paper: https://huggingface.co/papers/date/2025-10-08  
-- Demo: https://huggingface.co/spaces/AgentFlow/agentflow  
-- Website: https://agentflow.stanford.edu/  
+- HF Paper: https://huggingface.co/papers/date/2025-10-08
+- Code: https://github.com/lupantech/AgentFlow
+- Demo: https://huggingface.co/spaces/AgentFlow/agentflow
+- Website: https://agentflow.stanford.edu/
+- Youtube: https://www.youtube.com/watch?v=kIQbCQIH1SI
 - X (Twitter): https://x.com/lupantech/status/1976016000345919803