OwnCast is a free open source self-hostable streaming platform, basically a libre alternative to Twitch, and also currently testing Fediverse support too!
There's more info about it on its website at https://owncast.online
The project is looking for help running an OwnCast dedicated Fediverse account. (There is currently a bot at @owncast but this just provides automated posts about streamers.)
If you think you can help with this, or want to be involved with the project in any other way, get in touch with OwnCast here:
The project lead is on the Fediverse at @gabek@mastodon.social
@owncast @gabek@mastodon.social
You can also stream live video on @peertube (though this doesn't yet have chat support).
PeerTube is a Fediverse platform, so people on Mastodon etc can follow PeerTube accounts, and any new live streams will appear as posts in their timeline.
PeerTube live streams can be ephemeral (and disappear straight afterwards), or they can be set to archive automatically so that people can watch later.
PeerTube's p2p technology means instances won't crash if a stream goes viral, as it spreads the load between viewers.
Small update on this, Owncast do now have their own Fediverse account, it's at:
They have a thread on how to contribute here: