MarkDown插入音视频标签

视频：

<video id="video" controls="" preload="none" poster="https://www.baidu.com/abe1a3f.jpg">
<source id="mp4" src="https://www.baidu.com/abe1cc20015f715474aded8.mp4" type="video/mp4">
</video>

音频：

<audio id="audio" controls="" preload="none" >
<source id="mp3" src="https://www.baidu.com/abe11ddf7c67f15b72829d654.mp3">
</audio>