JavaScript video technology only 17 years in the making

This seems to work by periodically grabbing a data file like http://www.dsny.com/g2/data/arizona/13m.1, and then the javascript appears to extract base64 encoded .jpgs out of that which it plays back to make the video?

What's interesting is that each of the jpg's appear to have big black portions, so it's obviously doing a sort of overlay/compression type thing and stitching complete images back together.

Anyone got any clues on the audio part?

Wow, this article is bad. And the comments are so positive, one has to wonder how many come from the writer's friends...