Camera

In trailer and films caerma is one of the key elects of setting the mood capturing the attention and making a character look and feel the way the audience want them to feel in the moment. there are a variety of different camera shots for example:

Medium shot - this is when the camera is potion about half way towards someones body so that only half of them or not all of the body is in the shot.  these shots are found run the genre horror frequently as the effect of the distant to the character allows the audience to see the setting but aisles the characters emotion and feelings.
Low angle shot - this shot type is used to make a character or object look domeient and strong the camera is at a low angle facing upwards to give the effect of the person or object height to look bigger which gives the effect of being threatened thats why this camera shot is seen in also horror to make the antagonist look more deadly and fearsome.
close up - this is when the camera is directed closely up to an object or persons face this camera shot is used effectively to capture the facial expression of a person or object this creates tension in a scene especially horror as it is normally used for the jump scares.

Over the shoulder shot - this shot is used to effect in all genre types as it allows for point of view.  this shot is also used when two people are seen in conversation as it allows for the audience to see the other persons facial expression thats not speaking. this shot is used in horror also effectively as when close up to the shoulder it burrs the background which in theory creates a edgy atmosphere.
Establishing shot - an establishing is commonly used in film to set a scene so that the audience can tell where the scene and next shot is going to be this is commonly seen In horror films as most American horror films are set in old suburban houses.