Use of Ogg formats in HTML5
, HTML5 video is not currently as widespread as Flash videos, though of recent rollouts of experimental HTML5-based video players on websites, DailyMotion is so far the only one to use Ogg Theora and Vorbis formats, which suggests an increasing early interest in adopting HTML5 video.
Upload components
HTML5 is a new HTML standard developed to add multimedia support to HTML. It is supported on Windows, Mac OS X, Linux, iOS, Android, and Windows Phone. 
Since the format is still under development and some of the features employed for uploading files are still not part of the standard, HTML5 upload components are not common at the moment. Their support is restricted to a subset of browsers.