https://en.wikipedia.org/wiki/Superghost_(game)

https://en.wikipedia.org/wiki/Ghost_(game)

Owncast is the self hosted stream thing. It has some rudimentary federation capibilities, but nowhere near the ease discovery of twitch.

I know some streamers that have an owncast, expired_popsicle uses debian Linux and has one. (It’s tech/linux streamers because of course).