There is a large body of knowledge in Video. Video inevitably is deep web as the bots can't understand it. Infosec tends to have a lot of video therefore this knowledge is hidden from the surface web by the nature of the media.
Today I've updated to entries with a large repository of videos in Infosec-
Cyber War / InfoSec
Iron Geek irongeek.com -- An excellent library of videos explaining many facets of InfoSec and hacking & security
Security Tube - securitytube.net -- A large library of videos covering many topics in InfoSec, cyberwar, and most of the hacking conferences.
DefCon -- The main hackers Con, so well known that now the Feds send their folks here and it has become a wild west training ground for coming trends. Archives go back to Defcon 1. They are now on Defcon 20, I think.