Seems like a great tool to livestream with people without using any proprietary software. Haven't used it myself though. Just takes a browser and no extra software for guests.
How to setup OBS Studio to add live smartphone Video and Audio for Freehttps://odysee.com/@zulfphotography:6/how-to-setup-obs-studio-to-add-live:e
Source code: https://github.com/steveseguin/obsninja
Project description: "OBS Ninja lets you bring remote video feeds into OBS via WebRTC"