Thanks to jill/txt I found a briliant presentation given by Michael Wesch where he presents “An anthropological introduction to YouTube” at the Library of Congress. In case you missed it Michael Wesch is the man behind the great film (among others) which explained Web 2.0 in under five minutes called “The Machine is Us/ing Us”
Wesch does not only have a deep understanding of the mediun he studies but he also is very good at using the medium to explain its importance.