At the TechEd EMEA conference in Barcelona a few weeks ago, during a talk on making web experiences accessible, we gave our first public airing of a video player written in Silverlight which is capable of meeting all of the WCAG 2.0 Time based media Guidelines up to AAA  (assuming a suitable media source). The code has been released for use in your own projects under the Microsoft public license and is available at www.codeplex.com/amp.

The media play shows how a video can be supplemented with captions and sign language (for people who are deaf) and audio descriptions (for people who are blind). Other users may like these features well (think cognitive and loud environments), and we hope to build upon them with a community of developers.