Wikiversity Film School filmmaking courses are free. The only requirement is you must submit your homework assignments so others can benefit.
The following is from http://en.wikiversity.org/wiki/Filmmaking:
Film School Preparatory
Wikiversity Film School is a preparatory school for budding filmmakers who plan to go to film school or take classes in motion picture production.
Each year, USC Film School receives 800 applicants to fill just 50 undergraduate positions.
We teach you the things that film schools expect you to know before you get to film school so that you can have a base to work from when you first start film-school.