tag = document.createElement('script');

​

tag.src = "https://www.youtube.com/iframe_api";

let firstScriptTag = document.getElementsByTagName('script')[0];

firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);

​

let player, timeStamps = [0, 9.9];

​

function onYouTubeIframeAPIReady() {

  player = new YT.Player('player', {

    height: '390',

    width: '640',

    videoId: '_gozzJ5Yjsc',

    playerVars: {

      'version': 3,

      'controls': 0,

      'start': 0,

      'end': 10,

      'modestbranding': 1

    },

    events: {

      'onReady': onPlayerReady

    }

  });

}

​

function onPlayerReady(e) {

  e.target.playVideo();

  e.target.setVolume(20);

  setTimeout(updateDisplay.bind(this, e), 1000);

  loopVideo();

}

​

function updateDisplay(e) {

  vp.style.display = 'block';

}

​

​

function loopVideo() {

  // console.log(player.getCurrentTime());

  setTimeout(loopVideo, 0);

​

  if (player.getCurrentTime() >= timeStamps[1]) {

    player.seekTo(timeStamps[0]);

  }

}