It is 48 mins long, it is about the impending oil/energy crisis and how to attempt to cope. It touches permaculture and it also shows couple of good examples of forest gardens in Britain.
I watch a decent amount of documentaries, but I gotta say I liked this one a lot!
(best quality I could find, but it has hardcoded subtitles in what I believe is dutch)
(without subtitles, but poorer quality).