I've heard commentators say the opposite. Look we disagree, whatever, watch it again, the idea that the ARC is watching different footage makes no sense on many levels, at least in that particular case.
Putting that aside, a couple more annoying technical points, why does the ARC footage sometimes comprise of multiple angles on a split screen, and sometimes just one angle taking up the whole screen? The logical reply would be 'it depends on what is best for any given case' right? And I'm sure that would be the official line, but that is not what happens. Sometimes one screen one angle, sometimes split screen with multiple angles simultaneuously, sometimes they will sequence different angles one-by-one. As far as I can tell its random which one they use. Sometimes you think 'we need another angle' and they don't give it, sometimes you think 'why are they showing multiple angles when its obvious from the first one?' For me that is just indicative of the thing being poorly run.