We're all familiar with format wars — VHS v. Beta, Blu-ray v. HD-DVD, even the 19th century's AC v. DC war of the currents. What you may not be familiar with is the current 4K video compression format war between HEVC (High-Efficient Video Coding, aka H.265), Google's VP9, and a new and potentially disruptive entrant, AV1 from the Alliance for Open Media(AOM).