Here's a summary of accessibility presentations from DrupalCon San Francisco & Chicago. I've put them in an order that I hope will allow people who know nothing about web accessibility to progress through a rather complex subject.  All DrupalCon videos are stored on Archive.org which now also has an option for using HTML5 video.

This is my first time using this great new HTML5 tag to embed a video. It's also a great space to higlight that there are as yet no captions available for these videos & I've yet to figure out how to make the controls accessible to keyboard only users & screen readers.  I'll certainly look at what options I can come up with using tools like Universal Subtitles & YouTube's Auto-Captioning. I've added Universal Subtitles so we can start adding captions to these videos. I also ran these all through the Videos for Everyone generator so that it would be available in Flash & HTML5.