A teaser trailer is a short trailer usually under thirty seconds used to advertise an upcoming movie. The purpose is not to show the audience clips from the film to show the movie’s plot, instead it is used to make the audience aware that it is coming in the near future and to create a hype about it. They are sometimes made when the film is still being produced. A theatrical trailer is a two to three minute advertisement for movies that plays before a film in a cinema. Traditional trailers were showed at the end of a film. Usually they are other films from the same firm making it valuable because this is advertising their other films.