Around 1:00:00 they digress a bit into the evil legal battles that go on in big food business. While I don't doubt that goes on, it goes on in every industry, not just food. Software patents are just as evil and stupid as food patents. That part's a bit of a boring sidetrack and lasts around 25 minutes. They also briefly sidetrack on the fact that food price is tied to fossil fuels, which again is not in any way specific to food.
Overall I liked it - aside from their little jabs about fossil fuels (they're apparently global warming advocates), the whole thing seemed really well done.
That's a red herring and guilt by association though. Ok so the food industry did that. It still doesn't follow that EVERYTHING they do is bad. It also does NOT prove anything about genetically engineered food.
That's the problem with these things. They try to fool people with that crap, instead of providing evidence. The sidetracking you noticed are further red herrings, as you recognized. You're on the right track. That's the stuff to look out for.