I can't view the video (refuse to install flash on 64-bit linux), but just in case anybody hasn't seen it, beej's guide to networking is pretty nice. http://beej.us/guide/bgnet/
If you are looking to do a bunch of network programming in Java look at Netty. I have been using the JBoss Netty Network Application Framework - http://www.jboss.org/netty/ for about 3 months and have been very happy with it.
It is a great framework with a good community around it.
