video标签设置autoplay后无效

<video width="320" height="240" controls autoplay>
   <source src="https://www.runoob.com/try/demo_source/movie.mp4" type="video/mp4">
 </video>

解决方案：增加​​muted​​标签即可

<video width="320" height="240" controls autoplay muted>
  <source src="https://www.runoob.com/try/demo_source/movie.mp4" type="video/mp4">
</video>