html5 兼容版本 video

<!-- first try HTML5 playback: if serving as XML, expand `controls` to `controls="controls"` and autoplay likewise --><!-- warning: playback does not work on iOS3 if you include the poster attribute! fixed in iOS4.0 --><video width="640" height="360" controls> ?<!-- MP4 must be first for iPad! --> ?<source src="__VIDEO__.MP4" type="video/mp4" /><!-- Safari / iOS video ???--> ?<source src="__VIDEO__.OGV" type="video/ogg" /><!-- Firefox / Opera / Chrome10 --> ?<!-- fallback to Flash: --> ?<object width="640" height="360" type="application/x-shockwave-flash" data="__FLASH__.SWF"> ???<!-- Firefox uses the `data` attribute above, IE/Safari uses the param below --> ???<param name="movie" value="__FLASH__.SWF" /> ???<param name="flashvars" value="controlbar=over&image=__POSTER__.JPG&file=__VIDEO__.MP4" /> ???<!-- fallback image. note the title field below, put the title of the video there --> ???<img src="__VIDEO__.JPG" width="640" height="360" alt="__TITLE__" ????????title="No video playback capabilities, please download the video below" /> ?</object></video><!-- you *must* offer a download link as they may be able to play the file locally. customise this bit all you want --><p> <strong>Download Video:</strong> ?Closed Format: ?<a href="__VIDEO__.MP4">"MP4"</a> ?Open Format: ?<a href="__VIDEO__.OGV">"Ogg"</a></p>