HTML5 Video Player Framework (By Microsoft)

Player Framework is an open source video player framework for HTML5, Silverlight, Windows Phone and other platforms.

It offers a JavaScript API for controlling the player where the API methods are the same on both the HTML5 and Silverlight versions.

Such a consistency is very handy for using any of the versions as a fallback of the other with almost no extra coding.

The framework has support for playlists using an array of media items or using a link to a media RSS feed.

W3C timed text (TTML) for captions can be used and there are controls like volume, mute, fullscreen, poster-displaying.

Player Framework is modular, can be extended easily and its look/feel can be customized using CSS.