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.
Video email
Html4 markup language, in use since 2000, doesn't support multimedia elements natively. Html4 email systems typically simulate embedded video in email by having an embedded image (gif) which appears like a frame from a video. Clicking on the image causes a hyperlink to be launched in a browser window to display a video using the browser's video codec or a rich internet application like Adobe Flash. Many codecs and rich internet applications are not natively supported in browsers and require browser extensions to operate which can impede embedded video display.