There are different film genres the most common are Comedy, Horror, Action and Thrillers,
For an action trailer, like the one below we tend to see a lot of the special effects and the large explosions at some stage in the trailer. The trailer below has music in the background throughout the music increases in tempo as the action progresses. Action trailers seem mainly to consist of explosive scenes and fast paced fight/action scenes.
Comedy trailers seem to have a voiceover. The trailers also seem to include a selection of the films funniest moments this is in order to make viewers of the trailer believe the whole film will be as funny as the moments in the trailer.
Horror Trailers tend to show the main characters of the film and the evil thing which will hunt them down throughout the film. The trailer below has a quite slow tempo music which builds up in pace and tempo throughout the film. The scenes of get darker and more gloomier towards the end of the trailer. The trailer below uses titles to build up suspense and tension.
Thriller trailers are often very similar to action trailers. however thriller trailers tend to be all action whereas an action film/trailer tends to have comical moments. Thriller trailers are all action and they seemto constructthe mission which the hero or main character will have to undertake throughout the film.