Its just a video of how he made the end result photo that he shows at the end. He just keeps the aperture open so that any light he uses in front of the camera appears in the photo, and he has obviously become very adept at writing backwards.
That was one of his more simple "making of" videos, try these ones out..http://www.flickr.com/photos/twincities ... otostream/http://www.flickr.com/photos/twincities ... hotostream
His two most recent. I have helped him make a couple videos when I rode along with him on his 'missions' haha!