This appears to be The Short Snow.

https://store.steampowered.com/app/3054440/The_Short_Snow/

You can close signups on PeerTube and just run it for one channel. I’ve been doing something similar minus the YouTube mirroring. Honestly works well and is a pretty great solution. Not what you’re asking for, but it is a possible solution.

I swear I checked there, but sure enough you’ve found it. Appreciate the help, man.

Same request here. I haven’t found a way to set my default feed to All Active. Hoping I’m not just dumb and haven’t seen it.