HTML5 Video Player Framework By Microsoft Media Platform
Player Framework is an open source video player framework for HTML5, Silverlight, Windows Phone and other application platforms. A comprehensive list of features including easy customization of the UI, plugin models, advertising standards support, W3C timed text (TTML) support for captions and more.
It offers a JavaScript API for controlling the player where the API methods are the same on both the HTML5 and Silverlight versions.

HTMl5 Video Player Framework Features
- JavaScript API for both the HTML5 video tag and the Silverlight player
- Pure JavaScript initialization by injecting the Player into a web page without pre-existing video or object tags.
- Accessible functionality through the use of alt and title tags and tabbable controls.
- Playlist support using an array of media items or using a link to a Media RSS feed.
- Closed Captions support using the TTML/DFXP specification
- Styleable controls
- Interactive timeline
- Volume control
- Mute control
- Full screen control
- Poster support
- Support for mobile platforms
- No other 3rd-party JavaScript libraries required
- Pre-load UI
- Error handling
Such a consistency is very handy for using any of the versions as a fallback of the other with almost no extra coding.
Website: http://playerframework.codeplex.com/
Demo: http://playerframework.codeplex.com/documentation

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I like the new look of the JW Player is faster is better and my slow computer with crappy video card will not got slow anymore, nice job you guys! html5 media player