There are so many documentaries out there, each targeting a specific aspect of how veganism benefits our world. Here are some of the few I’ve seen, but there are so so so many more out there!
What the Health (health)
Forks over Knives (health)
Earthlings (animals; ethics)
Vegucated (follows the lives of people switching into veganism based on various issues)
How to not die (book; health)
KinderWorld.org (videos showing ethics)
Earthling Ed YouTube (health, animals & environment - vegan activist and how he spreads awareness)