Download self-owned YouTube videos

[sgbaird]

In creator dashboard, there's a way to download it via GUI. Some possibilities:

• use browser cookies: https://stackoverflow.com/a/55272225
• use youtube-dl: https://github.com/ytdl-org/youtube-dl

Terms of service: https://www.youtube.com/t/terms

Cc @Jonathan-Woo

[sgbaird]

@Neil-YL if you end up getting stuck on the new picam device.py script, could you give this one a try? Ideally, it would be great to have the full restart + download workflow tested to show that we can store and retrieve 24/7 streams.

[Jonathan-Woo]

Switched to using yt-dlp instead of youtube-dl because it's more actively maintained.