Structure of Film Trailers

The majority of film trailers usually follow a similar structure. The most common is known as a "Three-Act Structure", which is also the most common structure used in the actual feature film.
The structure starts with a beginning (act 1), and this is used to set out the premise of the plot line. The middle (act 2) progresses the story further and usually ends with a dramatic climax. Act 3 usually features a powerful and significant soundtrack. Act 3 commonly consists of a montage of clips from the film, these clips are usually the more emotional and powerful clips of the film. Also within one of these acts there is sometimes a cast run of different names if there are any actors which are significant enough to promote the film.