H5网页播放MP4代码
<video width="500px" height="300px" style="width: 100%;height: 100%" autoplay="autoplay" >
<source type="video/mp4" src="https://douyin2018.oss-cn-shenzhen.aliyuncs.com/d9f94541f5c85847e51416754589e11e.mp4" >
</video>
<video src="https://douyin2018.oss-cn-shenzhen.aliyuncs.com/d9f94541f5c85847e51416754589e11e.mp4" poster="http://wei.hzrt.cn/uploads/n/nnnuou1452216449/5/4/3/e/5b45a7890d3a0.jpg" controls="controls" style="width: 100%;height: 100%"></video> 