For as long as there have been feature films, there have been movie trailers in advance to advertise the film.....to tease the viewer with the most exciting collage of the best and most titillating scenes from the movie. Movie trailers are meant to entice the movie goer into coming to see the feature film when it is released. They are mostly short, quick, and to the point. No excess fat. They obviously work because no film is ever released without a movie trailer in advance. Movie trailers are a staple of movie making.
But what does film have to do with books? The written word. Film is a different beast than the written word....than a book. It's a totally different experience. The visual, candy for the eyes of films, as opposed to the written, words for the brain. But is there really that much difference or just a difference in how we are getting the information to the one place it all goes to anyway--our brain?