As we started with our video project we searched the web for useful resources. We put all these results in a structured link-directory. So there is an small overview of mainly free resources. We tagged the links with information like quality and if there is an registration required to download (tag: only with registration)
It’s available for everyone
link to directory: http://imunnation.org/ngd/?cat=53
search whole database:
http://imunnation.org/ngd/?page_id=3