You don’t need a Hollywood budget to make a book trailer. Novelist Richard Melo made a book trailer (embedded above) with public domain video clips.
Here’s more about the video:
This is the first in a series of short films highlighting an aspect of a new novel published by Red Lemonade in June 2013. The book begins at an American nursing academy established in Haiti during the 1950s. The images are from public domain films (listed below), while the background songs are Laura Nyro’s ‘Sweet Blindness’ and Brigitte Fontaine’s “Il se passe des choses.” You can learn more about Happy Talk and the short film series at facebook.com/harborcoat