Storytelling is an excellent way to begin to understand the nonviolent idea, and there are a number of films out there that do a good job of documenting or dramatizing nonviolent events. Metta Center recommends the following films.
Documentaries:
Pray the Devil Back to Hell

Burma VJ

A Force More Powerful

Bringing Down A Dictator

The Singing Revolution

Orange Revolution

Mesalla: Activists in Iraq

Drama:
Gandhi

Beyond Rangoon

The Long Walk Home

Lage Raho Munna Bhai

Sophie Scholl

Joyeux Noel