Joining Greylock in the round are David Tisch (of TechStars), YouTube founder Chad Hurley, actor/singer/songwriter Jared Leto, Sound Ventures, Vayner/RSE, Comcast Ventures, Sherpa, Slow Ventures, Soma Capital, Universal Music Group, Raine Ventures, Broadway Video Ventures, WME, CAA Ventures, and UTA. Previous investors Aleph and Entree Capital are in this round, as well. via Meerkat Confirms