Another site dealing with security has been launched... go check out http://www.securitytube.net
I received this link via a Group Membership from Google Groups... the little blurb that came with it says the following,
"a community driven videos website for
computer networking and security related fields. Though there are many
video sharing websites available online, SecurityTube.Net is strictly
focussed on hosting computer networking and security videos only."
I have not really gone through all the content but it seems pretty decent with some interesting stuff for those trying to get to grips with some the terms and technologies.