设置视频默认为快速播放 - 在线编辑器

          <video id="myVideo" width="320" height="240" controls>
  <source src="/examples/movie.mp4" type="video/mp4">
  <source src="/examples/movie.ogg" type="video/ogg">
  您的浏览器不支持 video 标签。
</video><br>

<button onclick="getPlaySpeed()" type="button">视频默认播放速度为?</button>
<button onclick="setPlaySpeed()" type="button">设置快速播放</button>

<script>
  var x = document.getElementById("myVideo");

  function getPlaySpeed() {
    alert(x.defaultPlaybackRate);
  }

  function setPlaySpeed() {
    x.defaultPlaybackRate = 5;
    x.load();
  }
</script>
        