"From what I gather none of the footage used is really copywrited, though honestly I'm not going to go through all those sources to double check...."
Everything used in this project is copyrighted to someone. (but i've bequeathed the entire project to the Public Domain) The current copyright system (of the US) does not require anyone to document their copyright, it is granted when any creation is made. (and in some people's point of view, current copyright is endless, since every 20 years Congress extends it) This is one of the issues this DVD brings up, is there room in the current state of things to allow a creation (one which willfully infringes) of this sort to exist. Some will say it's ok, some will say you need permission before reusing and others will balk entirely.
none / %20