Bleeding Edge HTML5

I saw this presentation on the Google Developers Day, the WebRTC was working during the presentation.

"webkitMediaSourceURL is not available"

Guess my latest Chromium isn't bleeding edge enough.

I'm getting lots of "503 Service Unavailable".

Doesn't work in Firefox or Chrome for me.

the page is empty except for the js-alert telling me that "webkitMediaSourceURL is not available"