Establishing Shot

Definition:-

A usually long shot in film or video used at the beginning of a sequence to establish an 
overview of the scene that follows.

)

This is a video of a collection of professional establishing shots used in blockbuster films. Most of these show a a long shot of a city or other central location where the film is set. This helps to set the scene for the audience and helps them to possibly understand more about the background of the movie. It is always at the beginning of a scene.