Clocking in at 13:43, John Green explains the social hierarchy (i.e. social structure/race) in Latin America as well as revolutions in Brazil, Mexico, and Venezuela. I would just use from minute 8 through the end because it's less confusing and focuses on less material.
This clip gives us a ray of hope. It shows how farmers use cutting and burning techniques, but helicopters and satellite technology help the Brazilian government slow deforestation by 75%.
4:09