There is echo

[odats]

I run the code and hear an echo.

The following code does not fix it:

const pc = new RTCPeerConnection(servers);
pc.setConfiguration({echoCancellation: true});
pc.setConfiguration({noiseSuppression: true, autoGainControl: true});

[PhilippeArtean]

adding "muted" to the html video element seems to fix it