#PeerTube with the lightning plug-in has this capability. Channel owners can configure splits for their channel, and viewers on PeerTube with a WebLN capable browsers can stream Sats or send boostagrams.
https://noagendatube.com/w/iPFwMR7SXb4CQjNGoVTdn1
When viewing PeerTube videos on a Mastodon timeline, if WebLN is detected and a split is configured, there will be a lightning icon you can click to send a boostagram from the timeline.