Start & End the Live (Go Live & End Stream)

updateTransition.js

function updateTransition(transitionState){
  YouTube.setTokenService(function(){ return getYouTubeService().getAccessToken(); });
  var resp=YouTube.liveBroadcastsList("snippet,status", {id:videoId});
  return YouTube.liveBroadcastsTransition(transitionState, videoId, "status", {});
}

function startLive(videoId){
  const transitionState="live";
 	updateTransition(transitionState);
}

function endLive(videoId){
  const transitionState="completed";
 	updateTransition(transitionState);
}