The State Of HTML5 Video

Key points from the The State Of HTML5 Video report by LongTailVideo (last updated on April 19, 2012):

• 75% of the desktop & mobile browsers can play HTML5
• 50% supports either WebM or MP4. Firefox doesn't support MP4 as it has "no plans to support patent encumbered codecs"
• 90% of tag attributes (poster, preload, autoplay, controls) are supported. Mobile browsers ignore preload (video is never preloaded) and autoplay (video is never played upon page load).
• 80% of API features (loading, buffering, playback, seeking, volume) work reliably.  The video tag provides an extensive JavaScript API for controlling its content.
• 50% fullscreen support is halfway there. Although the HTML5 fullscreen specification is still in its infancy, most browsers have now implemented either a fullscreen control or a scripting API.
• 30% of accessibility (keyboard control, closed captions) is available. The HTML5 Text Track element (<track>) is designed to add closed captions to videos (plus subtitles, descriptions, chapters & metadata).
• iOS is the only platform with streaming. Adaptive streaming formats, like video codecs, are not part of the HTML5 specification.

Also see:

• HOW TO check what HTML5 features a browser supports
• Get Microsoft certified in HTML5 with exam 70-480
• Free 42 episode video series on HTML5, CSS3, JavaScript for beginners