Teasers are a much shorter preview or advertisement that lasts only 10 to 30 seconds. Teasers are used to get patrons excited about a film coming out in the next six to twelve months. Teasers may be produced even before the film production is completed.when theaters added more screens or new theaters were built with a lot of screens, all different trailers were shown even if they weren't going to play that film in that theater. Film studios realized that the more trailers that were shown (even if it wasn't going to be shown in thaImprovements since the late 19th century include the mechanization of cameras – allowing them to record at a consistent speed, quiet camera design – allowing sound recorded on-set to be usable without requiring large "blimps" to encase the camera, the invention of more sophisticatedt particular theater) the more patrons would go to a different theater to see the film when it came out. The term "trailer" comes from their having originally been shown at the end of a film program.The necessary steps for almost any film can be boiled down to conception, planning, execution, revision, and distribution. The more involved the production, the more significant each of the steps becomes. That practice did not last long because patrons tended to leave the theater after the films ended, but the name has stuck. Trailers are now shown before the film
film making studio
