I have only watched a little of it and it is disturbing to say the least. How much is true and how much is not true is hard to say, but by now it should be very obvious to everyone in the world that in the USA big business operates under different rules than the ordinary man, and it has been that way under a variety of different Presidents.
However, to tie this in with GM crops I have said this more than once, nobody had to hold a gun to my head to get me to plant Roundup Ready soybeans, and then several years later nobody had to hold a gun to my head to get me to plant Roundup ready corn, and this year nobody had to hold a gun to my head to get me to plant triple stack corn, I cheerfully did it on my own. As long as the consumer wants the cheapest possible food, GM crops are going to become more and more the norm, because they are so much easier and therefore cheaper to produce. Consumers talk about caring where their food comes from and who raises it, but at the end of the day the cheapest is usually what ends up in the grocery basket.