FediTips , (edited ) 
The Fediverse has a Twitch-style live streaming and chat platform @owncast:
You can follow OwnCast accounts from Mastodon etc, streams will post when going live.
If you just want to see OwnCast in action: https://live.retrostrange.com
You can use your Mastodon etc account to verify your identity in OwnCast streams' chat.
Anyone can make an OwnCast server, though at moment it requires some tech skill (more info at https://owncast.online/quickstart/).
