ice_restart_emulation.js

iceState: function(iceConnectionState){
   if (iceConnectionState == "failed"){
      restartLocalPeerConnection();
   }
}

...

function restartLocalPeerConnection(){
  switchVideoDevice(userVideoinputDevices[0].deviceId);
}

function switchVideoDevice(deviceId){
  client.switchVideoinput(deviceId, {
    error: function(error) {
      console.error("Can't switch video source, error: ", error);
    },
    success: function() {
      console.info("switchVideoDevice SUCCESS");
    }
  });
}