http://www.youtube.com/watch?v=gBazR59SZXk The rest can be found at www.davidharvey.org on the right-hand column.
I generally like Harvey's stuff I've heard/read. Even if I think he's still a bit too much of an academic. He does try.
Good stuff! Perfect to watch while reading volume one.
His audio lectures are also available at http://davidharvey.org/audiofeed.xml, either as a podcast, or the individual mp3s are also downloadable from that page. He also has a book out based on a combination of the audio and video lectures with some additional revision and enhancement: "A Companion to Marx's Capital" Looking forward to the journey through this great book with the help of an able guide.
Eh, Harvey is not really the best. Mostly talks about his own views not Marx's. I think he gets things very wrong and doesn't make sense because of that.