要自动启动视频，请使用autoplay属性：

To start a video automatically use the autoplay attribute:

<video width="320" height="240" autoplay>
  <source src="movie.mp4" type="video/mp4">
  <source src="movie.ogg" type="video/ogg">
Your browser does not support the video tag.
</video>

HTML视频 - 浏览器支持

目前，有3种支持的视频格式用于&放大器;放大器; lt;视频&安培;放大器;放大器; GT;元素：MP4，WebM和Ogg：



浏览器MP4 WebM Ogg

Internet Explorer是否否

Chrome是YES YES

Firefox是是是

Safari是否NO

Opera YES（来自Opera 25）YES YES

HTML Video - Browser Support
Currently, there are 3 supported video formats for the <video> element: MP4, WebM, and Ogg:

Browser MP4 WebM Ogg
Internet Explorer YES NO NO
Chrome YES YES YES
Firefox YES YES YES
Safari YES NO NO
Opera YES (from Opera 25) YES YES