Two things I just found out:
1. holy fuck the holodex website is amazing in how it grabs music from timestamps for archived singing streams and lets you play them as a playlist, I am still in awe at how well this works
Example: Suisei --
https://holodex.net/channel/UC5CwaMl1eIgY8h02uZw7u8A/music2. HoloID teamup is dead, KFP teamup is pretty cool
https://stream-calendar.vercel.app/