Dude! I’m going to guess this was done by one of Stephan Harding’s students–it just popped up on our radar screen through a Google alert. Anyhow, this  has got to be the first TV “commercial” for one of Chelsea Green’s books, and it couldn’t have happened to a nicer book.
One thing I’d like to point out is that the video shows Harding using a very old computer, one of the very early Macintosh models. Kudos to Harding for keeping an old workhorse going. Huge amounts of energy go into manufacturing computers , so learning how to keep an old computer working and usable is a very good thing. Laptops are more efficient than desktops and even in standby mode computers can draw a surprising amount of power  (though, of course!, it is still better to leave your computer in standby than to leave it fully on, when it is not in active use).