I have seen many videos covering anthropogenic global warming, but this is by far the best one. Patrick Moore says everything I have been saying for years and then some. He does a better job of documenting and graphing the relevant information.
From Alberta's 6th annual "Freedom School" conference, on "Things that Matter: An Agenda for Alberta".
The first 14 minutes are about his background. Then he talks about various environmental issues and finally starts a one hour talk about Climate Change 24 minutes into the video.