HTML5的video和audio标签是用来在网页中加入视频和音频的标签，在支持html5的浏览器中不需要预先加载Adobe Flash浏览器插件就能轻松快速的播放视频和音频文件。而html5media.js可以在不支持html5的浏览器上使video和audio标签生效。(HTML5's video and audio tags are used to add videos and audio tags to web pages. In HTML5 browsers, videos and audio files can be played quickly and easily without loading Adobe Flash browser plug-ins. Html5media.js can take effect on video and audio tags on browsers that do not support HTML5.)