Screencasts from the HTML5 Developer Conference held on April 1-3 at the Palace Hotel in San Francisco will be posted here:
http://www.html5devconf.com/videos.html
They aren’t yet currently up at the location above, but have been trickling in. Below is the available screencasts from the 2013 HTML5 Developer Conference:
Steve Souders’ “Web Performance: How Fast Are We Going Now?”
Ariya Hidayat’s “WebKit Rendering Overview for HTML5 Developers”
Chris Wilson’s “Making the Web Rock: The Web Audio API”
Christian Heilmann’s keynote from 2 April