What, another hour-long video? Yes. Sorry, can't help it. Been stumbling across some good ones lately.
This talk, by David Keith, delivered at the Equinox Summit: Energy 2030 in June 2011, is about the most thought-provoking one I've ever heard on global warming, related resource issues, AGW mitigation, and our options and responsibilities. Denialists will no doubt be overjoyed at the cherry-picking they can do, but that doesn't mean it doesn't deserve the attention of the reality-based community.