[HANDS-ON BUG] Unit1 : Submission doesn't appear on leaderboard and video doesn't play

# Describe the bug

A clear and concise description of what the bug is.
https://colab.research.google.com/github/huggingface/deep-rl-class/blob/main/notebooks/unit1/unit1.ipynb#scrollTo=Avf6gufJBGMw

# Material

- Did you use Google Colab?
- yes

If not:
- Your Operating system (OS)
- Version of your OS
I also tried running on my local MacOS(15.6.1), and still the last part doesn't work. package_to_hub() part.
It submits to huggingface profile, but not to leaderboard.

Error:
✘ 'DummyVecEnv' object has no attribute 'video_recorder'
✘ We are unable to generate a replay of your agent, the package_to_hub
process continues
✘ Please open an issue at
https://github.com/huggingface/huggingface_sb3/issues