The Experiment Yify -

26 men are chosen to play the roles of guards and prisoners in a mock prison, only for the power dynamic to spiral out of control.

Adrien Brody (the leader of the prisoners) vs. Forest Whitaker (the guard who becomes a tyrant). The Experiment YIFY

If you liked the YIFY upload of the 2010 version, you might also enjoy: 26 men are chosen to play the roles

A more recent take that sticks closer to the actual historical facts of the 1971 study. The Experiment YIFY