I use to enjoy watching the science video series "Connections" that the BBC and James Burke produced back in the late 70's early 80's. Anyway, this documentary "After the Warming" is an excellent video on the topic of global climate change.
After the WarmingAn early documentary about global warming. It theorizes and tells facts about the effects global weather has had on our history. It then theorizes a lot more about its effects on our future and especially the way in which we will overcome it's bad effects. If you don't mind some, not proofed, theorizing from a reasonably intelligent guy, and are interested in our climate, this is probably a must see.
http://video.google.com/videoplay?docid=6514270139930450081#