[list=a][*]Semantics (the language) and how this might appeal to the prospective audience.[*]Visual impact of the broadcasting, ie specialist media techniques such as freeze frames/slow motion etc.[*]Audio/visual interaction and how this contributes to an enthusiastic and exciting experience (or not).[/list=a]
Don't forget to ask youself the question "to what extent?", and include those evaluative points to score more marks.