Emmanuel Vaughan-Lee discovered the power of "oneness" in jazz music. An accomplished bass player who was performing and teaching jazz by his mid-20s, he recalls with reverence those rare moments when an ensemble melds into something special that transcends the skills of the individual players. For the past five years, Mr. Vaughan-Lee has put that concept of "oneness" into practice on a larger scale: The musician has become a filmmaker. He has traveled the world producing short films that, while honoring diversity, seek to demonstrate the underlying bonds of humanity.