Michael Wesch is an anthropologist with an interest in the Internet. He posted an interesting video a while back (The Machine is Using Us) that got quite a bit of attention.
I just saw (via John Battelle's Blog) a video of him presenting at the Library of Congress. It is interesting to see him analyze and reflect on some of the changes that have occurred in the last few years, and how it is changing our world.
As someone who rarely spends much time watching video on the small screen, I enjoyed all of this 55 minute video.