使用HTML或<audio>元素将视频/音频内容嵌入文档中。视频/音频元素包含一个或多个视频/音频源。要指定源，请使用src属性或<source>元素。浏览器将选择最合适的浏览器。
音频标签示例：
<!-- Simple video example --> <video xx_src="videofile.webm" autoplay poster="posterimage.jpg"> Sorry, your browser doesn't support embedded videos, but don't worry, you can <a href="videofile.webm">download it</a> and watch it with your favorite video player! </video> <!-- Video with subtitles --> <video xx_src="foo.webm"> <track kind="subtitles" xx_src="foo.en.vtt" srclang="en" label="English"> <track kind="subtitles" xx_src="foo.sv.vtt" srclang="sv" label="Svenska"> </video> <!-- Simple video example --> <video width="480" controls poster="https://archive.org/download/WebmVp8Vorbis/webmvp8.gif" > <source xx_src="https://archive.org/download/WebmVp8Vorbis/webmvp8.webm" type="video/webm"> <source xx_src="https://archive.org/download/WebmVp8Vorbis/webmvp8_512kb.mp4" type="video/mp4"> <source xx_src="https://archive.org/download/WebmVp8Vorbis/webmvp8.ogv" type="video/ogg"> Your browser doesn't support HTML5 video tag. </video>
音频标签示例：
<!-- Simple audio playback --> <audio xx_src="http://developer.mozilla.org/@api/deki/files/2926/=AudioTest_(1).ogg" autoplay> Your browser does not support the <code>audio</code> element. </audio> <!-- Audio playback with captions --> <audio xx_src="foo.ogg"> <track kind="captions" xx_src="foo.en.vtt" srclang="en" label="English"> <track kind="captions" xx_src="foo.sv.vtt" srclang="sv" label="Svenska"> </audio>