MP4, WebM, and OGV are file formats.
WebM和OGV 都是文件格式。
MP4 is an industry-standard file format, but there's no guarantee that it will remain that way. There are many reasons to choose one of the other formats.
MP 4是一个行业标准文件格式，但这并不能保证将会维持下去。
MP4 is an industry-standard file format, but there's no guarantee that it will remain that way. There are many reasons to choose one of the other formats.
MP 4是一个行业标准文件格式，但这并不能保证将会维持下去。
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