Conventions of a Movie Trailer

Voiceovers
Apiece of narration that is not accompanied by an image of the person speaking.

Stars
The trailers show who is starring (acting) in the film. This may entice people to the film if they like those actors.

Titles The titles of the producing companies are added into the film trailers.

Dramatic camera angles Especially in horrors and thrillers, dramatic angles such as close ups, tilted and point of view shots focus a lot on the victim to add to the tension and horror and make the audience feel frightened. The dramatic angles and shots highten the emotions on the audience.

Music
Background music is used in most trailers to complement the film and to add to the tension or any other emotions that the film wants to portray. Film title shown at the end:The title of the film is shown at the end of the trailer a lot because it is that last thing the viewer sees so they will remember that name of the film.

Trailer builds to a climax
There is often a climax in the trailer to replicate the climax in the film to excite the audience.

Montage
Skill in editing where a series of shots are edited into a sequence to condense information. This is used a lot in trailers because there is only a short amount of time so condensing shots saves a lot of time and keeps the audience wanting to know more because not all information is revealed.