Book Trailer

O.K folks, lots of books these days have a book trailer made for them (similar to a movie trailer). I'm trying to decide if I should venture into that path for Aquatia. (Similar to this one: Book Trailer) Please help by answering these questions:

  1. Did you know that book trailers actually exist?
  2. Have you actually viewed book trailers?
  3. Did it affect your purchase?
Thanks a ton!