There are lots of livestreamers on the Fediverse now, thanks to the @owncast platform and @peertube adding livestream support too.
Here are some good ones you might want to follow:
MUSIC
@live
@jnktn_tv
@liveitlive
ART
@brandkopf
FILM & TV
@rstv
GAMING & TECHNOLOGY
@Hamish
@hatnix
@ozoned
@fedi
@wesley
If you follow an account, you'll see when it goes live on your Fediverse timeline.
Also check out OwnCast's directory at directory.owncast.online