Google search video lectures from UC Berkeley

I've just seen this link to 6 videoed lectures on Google etc. on Ben Toth's excellent blog 'Libraries in the NHS'. There's even one with Sergey Brin, co-founder of Google. I've yet to watch them so any feedback on them would be interesting. I'll let you know what I think once I've looked at them properly. Here's the link: http://video.google.com/videosearch?q=owner%3Aucberkeley+is141&page=1&so=2