插入音频

<audio id="audio" controls="" preload="none">
  <source id="mp3"src="https://sz-sycdn.kuwo.cn/4591311c3897b5be364a4a61fa5c0ee0/5e23f572/resource/n2/83/56/3583003746.mp3">
  </audio>

插入视频

<video id="video" controls="" preload="none" poster="http://img.blog.fandong.me/2017-08-26-Markdown-Advance-Video.jpg">
  <source id="mp4" src="http://img.blog.fandong.me/2017-08-26-Markdown-Advance-Video.mp4" type="video/mp4">
  </video>