An experiment with the RTPTransport APIs. Uses a browser to show incoming video and forward it to a whip server without re-encoding the frames.
In future it may require you to start your (chrome canary) browser like this
./Google Chrome Canary --force-fieldtrials=WebRTC-Bwe-InjectedCongestionController/Enabled --enable-blink-features=RTCRtpTransport
try it here: https://pipe.github.io/echoRtp/