I run a discord server for others downloading youtube content.

We maintain a list [1] of content that various members have archived, such that when content is removed from youtube, people can direct inquiries to contributors who have archived that content. It's a small way to keep track of what things have been successfully archived.

We are currently organizing some efforts to find and download unlisted videos.

Feel free to check us out here: https://discord.gg/EJvS4kf

[1] https://tinyurl.com/v4rpe9w

How many playlists do you have/create daily?

Just half a dozen. I only backup a set list of playlists (just an array of playlist IDs in bash I periodically change).