Apologies if anyone has already mentioned this site here but there are thousands of free documentaries to watch at the link below, no registration, no downloads, just click and view. Some great subjects too.
http://topdocumentaryfilms.com/ (http://topdocumentaryfilms.com/)
re upping my lame Street Carnage article on the topic http://streetcarnage.com/blog/open-mic-5-documentaries-to-see-with-some-guy/ (http://streetcarnage.com/blog/open-mic-5-documentaries-to-see-with-some-guy/)
note: everyone at that site hates me now