We would like to humbly share to valuable resources about eating a plant-based diet. These documentaries stick to the facts and do not go for a shock-sell. You will not find the more gruesome images here that you might find in other documentaries:
Making the Connection: This 30 min doco describes Veganism from a range of perspectives including a chef, a mother, and a marathon runner:
Making the Connection
The Secrets of Food Marketing: A short (7 min) talk about how food is marketed to consumers, and some tricks of the trade. It mentions some interesting historic factors.
The Secrets of Food Marketing