This is an experiment in backyard sustainability. It varies from Permaculture, in that his garden needs to be replanted every year, and each plant does not benefit the other. It's just one huge backyard garden. The plants he is growing, he has planted for the first time.
If you'd like to skip his New Age/global warming talk, begin at 1:30 on the counter. If you can't watch the entire video and want to cut the intro chit-chat, the tour of his garden starts at 10:40 on your counter.