What is a Trailer?

What is a trailer?

It should introduce the actors and actresses involved as well as name the film. Movie trailers have now been put onto DVD and Blu-ray discs as well as on the internet and mobile devices, this is done for even more advertisement of a particular film. A Trailer has to attract the audience in no more than 2 and a half minutes which is the maximum length for a trailer allowed by the Motion Picture Association of America.