anchor.diff:    localvideo.parentNode.insertBefore(remotevideo, localvideo);
   };
   
  +// David, may be used to handle remote transmitter hangup
  +//
   function onRemoteHangup(token) {
     var remotevideo = document.querySelector("#" + genVideoId(token));
     if (remotevideo) {
  
positive.code: console.log("controllerData", controllerData);
  var room = controllerData["Room"];
  
  function sendSignal(destinations, message) {
    var body = JSON.stringify(message);
    var data = {"destinations": destinations, "body": body}
  
negative.code: <head>
  	<title>WebRTC</title>
  	
  	<script src="/utils.js"></script>
  	
  	<style>
  	video {
  