Copied from Inside Higher Ed, Quick Takes, published online July 27, 2010, "The U.S. Copyright Office on Monday, [July 19th, 2010], promulgated a number of new exemptions to the Digital Millennium Copyright Act, including one allowing university staffers and students to hack DVD content and display it for educational purposes. If a university or student lawfully obtains copy of a DVD, the agency says, they can bypass the encryption so long as "circumvention is accomplished solely in order to accomplish the incorporation of short portions of motion pictures into new works for... Educational uses by college and university professors and by college and university film and media studies students." The exemption applies when professors or students want to use excerpts of the hacked DVD in documentary films or "non-commercial videos."
Statement from the Library of Congress: "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: (i) Educational uses by college and university professors and by college and university film and media studies students; (ii) Documentary filmmaking; (iii) Noncommercial videos".