Hmm, "docs4free.org" sounds little... Unprofessional, and "eduwarez" is kinda. It's never good to have "warez" in domain if you can think of some other domain without it.

I thought of something like "IncreaseKnowledge", it's quite a long name for a site, but when you watch documentaries, your knowledge increases, improves, you gain more knowledge. So you can even use something like: "ImproveKnowledge", "GainKnowledge", etc.