It would be nice if one of the ICE options in WebRTC was Tor. Note also that Tor is not the fastest wrt to streaming data.
it says it works in browser so you just run it from tor browser
I'm not sure how webRTC works in Tor though.
AFAIK Tor browser deactivates WebRTC to avoid leaking real IPs, so at least the P2P aspect wouldn't work. Not sure if seeding from the server works without it.