What Are Movie Trailers?
Previews or movie trailers are film promotions for movies that will be shown in the future at a cinema or big screen. We also see trailers broadcasted in television. Trailers are seen on DVD usually shown before a particular movie in a DVD starts.
Historically, movie trailers were shown at the end of the a film but it did not last long because audience tended to leave after the film ended because they have seen the entire movie. Because of this,trailers are now shown before the film show and serves as an advertisement to attract viewers or movie fanatics.