Guerillas are a cunning breed. Quick-witted and decisive, they have a knack for balancing speed and results. Music video director Rik Cordero isn’t fighting any wars, but guerilla principles guide his career. Those principles inspire Cordero, 28, to ambush city streets to capture a natural quality that extras on a soundstage cannot provide. They are also present when property owners chase him from a location crucial to a filming project, forcing the Queens, N.Y., native to instantly adapt his vision. No matter the challenges