WebRTC Playback

I am attempting to play back a WebRTC stream in Xibo v3.3. There is a HLS widget that works really well but not a WebRTC widget (want to use WebRTC for as close to real time playback as possible) Searches for WebRTC in this site have 0 hits.

Also the Xibo CMS in on an Internal LAN (as is the media server) where we might not have Internet access to embed a 3rd party player.

Any ideas on this?