• Motion pictures, as defined in 17 U.S.C. 101, on DVDs that
are lawfully made and acquired and that are protected by the
Content Scrambling System, where the person engaging in
circumvention believes and has reasonable grounds for
believing that circumvention is necessary because reasonably
available alternatives, such as noncircumventing methods or
using screen capture software as provided for in alternative
exemptions, are not able to produce the level of high-quality
content required to achieve the desired criticism or comment
on such motion pictures, and where circumvention is
undertaken solely in order to make use of short portions of the
motion pictures for the purpose of criticism or comment in the
following instances: (i) in noncommercial videos; (ii) in
documentary films; (iii) in nonfiction multimedia ebooks
offering film analysis; and (iv) for educational purposes in film
studies or other courses requiring close analysis of film and
media excerpts, by college and university faculty, college and
university students, and kindergarten through twelfth grade
educators. For purposes of this exemption, “noncommercial
videos” includes videos created pursuant to a paid commission,
provided that the commissioning entity’s use is
noncommercial.
This is open to interpretation... but ultimately, I do believe that the "short portions" piece is something to be cautious of...
However, this does not go on to define Bluray discs, so a transition to HD only sources may be necessary. Also, US law prohibits ex-post facto laws, meaning that earlier DVD sourced edits are protected by the laws that were in place at the time of their creation.
