I'm looking at the pion/ebiten example (https://github.com/pion/example-webrtc-applications/tree/mas...) but I can't find where exactly WebRTC comes in

The signaling server seems to just be a normal http server

Check the /game folder haha. The main.go file has all the stuff related to webrtc And yes, the signaling server IS a normal http server. That’s the whole point. You can set up a WebRTC connection by even just emailing each other the SDPs if you want