请参阅我对该问题的评论。您需要了解媒体容器，流，编解码器的概念，并阅读HTML5的可支持性问题< video> 元素：

http://en.wikipedia.org/wiki/Digital_container_format [ ^ ]，

http://en.wikipedia.org/wiki/Codec [ ^ ]，

http://en.wikipedia.org/wiki/Video_coding_format [ ^ ]，

http://en.wikipedia.org/wiki/Video#Video_formats [ ^ ]，

http：// en。 wikipedia.org/wiki/HTML5_video [ ^ ]。

-SA

Please see my comment to the question. You need to understand the concept of media container, stream, codecs and read on the problem of supportability of HTML5 <video> element:
http://en.wikipedia.org/wiki/Digital_container_format[^],
http://en.wikipedia.org/wiki/Codec[^],
http://en.wikipedia.org/wiki/Video_coding_format[^],
http://en.wikipedia.org/wiki/Video#Video_formats[^],
http://en.wikipedia.org/wiki/HTML5_video[^].

—SA