here are a few I have watched and recommend about food:
the world according to monsanto, jeffrey smith's gmo trilogy, the future of food, round-up ready nation, king corn.
I'll let you know if I remember any others, that list is from memory - there are a lot.
Environment movies are good too as long as its not "an inconvenient truth". That one should've been called "a convenient way to dupe the dumbed down nation to accept a tax on air while all along ingnoring the real problems"
Also, off topic a bit, check out 9/11 truth rising - it just came out. Imperative information for all of us budding activists...
"Etc."
-No end in sight
-washington you're fired
-Iraq for Sale
-outfoxed (for faux news people)
-Iatrogenocide- the biotechnology, politics, and economics of modern pandemics - horowitz
-emerging viruses and vaccines- horowitz
-American Drug War