Both Apple and Microsoft are betting on H264 for HTML5 video, while Firefox and Opera focus on WebM and Opera does both. Microsoft, however, is kind of an oddball; they first stated they would limit HTML5 video support in Internet Explorer 9 to H264, excluding all other codecs, but later made an exception for WebM, as long as the user installs the WebM codec. Now there's a new move by Microsoft ...
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