This is the video The Basics of Non Violent Communication with Marshall Rosenberg (founder of Nonviolent Communication). Nonviolent Communication is not about speaking in a certain way but about speaking from at certain point of view. Practicing zazen (zen-meditation) and Nonviolent Communication helps you become one with that Point witch has been called many things (your true self, the heart, God, the Buddha Nature, the Nirvana-perspective).
Link to danish Rinzai zen monastery: http://egelykloster.dk/en/node/73