If you were being kind of weird about it, you could try making a movie that was all text. Just frame after frame of words for the audience to read, like the Star Wars prefaces, but for the entire movie. At that point, would it still be considered a movie, or would it be more of a novel presented in video form?
Mokalus of Borg
PS - Also, ebooks could easily contain video, so you could do the opposite.
PPS - A bit like this, from CollegeHumor: The Kindle 3.