From the Wikipedia DMCA page:

"Rulemaking was scheduled to occur in 2009, but the final rule was not issued until the following year. The 2010 exemptions, issued in July 2010, are:[39]

Motion pictures on DVDs that are lawfully made and acquired and that are protected by the Content Scrambling System when circumvention is accomplished solely in order to accomplish the incorporation of short portions of motion pictures into new works for the purpose of criticism or comment, and where the person engaging in circumvention believes and has reasonable grounds for believing that circumvention is necessary to fulfill the purpose of the use in the following instances:
Educational uses by college and university professors and by college and university film and media studies students;
Documentary filmmaking;
Obsolete software and video game formats.
Noncommercial videos. (A new exemption in 2010, similar to a previous educational exemption.)"

One could argue fan edits fall under "noncommercial video’ I suppose. Or if you’re a film studies student like myself, could argue it falls under educational use.