There are four key media concepts which are Media Language, Representation, Audience and institution.

Media language is about the cinematography, editing, sound and mis en secene,of the filmor clip being created. Cinematography refers to the photographing of the movie itself, such as  the lighting and lenses that give certain effects, etc. Editing is the transtition of the clip and how it moves from one clip to another. Sound is one of the most important aspects of media language since without sound a film almost has no meaning. There are different aspects of sound such as diegetic and non-diagetic etc. Mise en scene is what is happening throught the whole film such as lighting, dress and make up, sound etc.
Representation is about representing ceartain groups of people or aiming a film at certain groups of people through gender, ethnicity and age etc. Audience is about appealing an getting the audience's attention by making films and aiming at certain audiences. Institution is what happens behind the scenes and how the producers or directors etc, work towards creating a film or documentery etc. The exam will ask for an anaylsis of the representation shown in a 5 minute clip as well as writing an essay on the film industry.