const videoPlayers = document.getElementsByClassName('video-stream html5-main-video');
var videoPlayerss = videoPlayers[0]
var startTimes = 30
var endTimes = 68
var startTimes2 = 90
var endTimes2 = 150
var startTimes3 = 185
var endTimes3 = 270
videoPlayerss.currentTime = startTimes;
videoPlayerss.play();
videoPlayerss.addEventListener('timeupdate', () => {
  if (videoPlayerss.currentTime > endTimes && videoPlayerss.currentTime < startTimes2 ) {
    videoPlayerss.currentTime = startTimes2;
  } else if (videoPlayerss.currentTime > endTimes2 && videoPlayerss.currentTime < startTimes3 ) {
    videoPlayerss.currentTime = startTimes3;
  } else if (videoPlayerss.currentTime > endTimes3) {
    videoPlayerss.currentTime = startTimes;
  } 
});