Nina Paley, author of Sita Sings the Blues, just released another animation called “Credit is Due (The Attribution Song)”; another in a series of Minute Memes. She’s released a few of these shorter animations and they’re all informative and fun.
According to the page for this video on archive.org, this video is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported license. According to the footer on QuestionCopyright.org
our content is released to the public and can be considered to be in the public domain: you may copy, share, excerpt, modify, and distribute modified versions of this and other pages from QuestionCopyright.org.. It’s unclear precisely how this work is licensed to you or if this work is under copyright at all. I can only guess that you are free to share unaltered copies of the work, transcode the work in its entirety to make it playable for yourself and others, and distribute copies of the work in its entirety with some reasonable amount of attribution (the more restrictive of the two sets of permissions). Until the two pages above are in sync I cannot be sure.
Update (2011-06-30): User “camille” (whom I believe is QuestionCopyright.org’s own Camille E. Acey) replied to my post about the confusing licensing on QuestionCopyright.org’s blog post about this video. Ms. Acey said that
it is impossible to actually *put* anything directly into the public domain unless it originates from a government agency. I believe that is untrue: I believe all American copyright holders may choose to place a copyrighted work into the Public Domain thereby forgoing all copyright power for that work. I also believe if this were not the case the many lawyers at the Creative Commons would not have worked on their public domain dedication (deprecated since 2010-10-11) and then later reworked their public domain dedication into CC0 in order to broaden the usefulness of the dedication. Given Ms. Acey’s belief about placing works into the PD, she continued