There are so many good films available on the public domain to help you understand the subject better. We have compiled a few of them for you.
A Life Connected https://www.youtube.com/watch?v=U6_hjA4cdjM
Why Vegan? https://www.youtube.com/watch?v=8GrbYVsK7vs
Myths and Truths about Vegetarianism https://www.youtube.com/watch?v=nclHgRDRsUY
Transition Into Vegetarianism: How To Become Vegan or Vegetarian https://www.youtube.com/watch?v=ipSgbgx1z_Y
The Vegetarian World https://www.youtube.com/watch?v=adZnCsVYnW4
Kenya Vegetarian Club 