You need to refer to BOTH!! Its really important that you differentiate between 'FRONTLINE' (the text we study) about the show 'frontline'. Basically they are making kind of opposite points if you get what i mean. FRONTLINE is using the technique of 'mockumentry' to reveal the shonky behaviour of the frontline team. Possibly the more important one to talk about is how FRONTLINE reveals that frontline's behaviour is wrong - i.e. satire, mocking, parody etc. The hand-held camera makes us feel like we are seeing 'the truth', the behind the scenes look at the making of a current affairs program. We therefore are inclined to beleive that this is what realy happens behind the glossy 'exposing' of the 'criminals' on typical current affairs shows. E.g. the parody of Ray Martin, though the character of Mike, reveals to us that the images of these hosts as concerned and all knowing is not correct.
All in all, we are studying a text which has a 'show within a show' style of presentation and hence, both 'shows' need to be talked about appropriately.