js 禁用视频快进与倍速

video.ontimeupdate = function () {
  let old = (window.localStorage.getItem(playTimeKey) * 1) || 0;
  // 进制使用倍速
  const {playbackRate} = video
  if (playbackRate !== 1) video.playbackRate = 1

  const cuTime = video.currentTime;
  if (cuTime - old > 2) {
    video.currentTime = old;
  } else {
    old = cuTime;
  }
  window.localStorage.setItem(playTimeKey, old)
}