(Reuters) - AT&T Inc on Wednesday named Jason Kilar, former head of video streaming platform Hulu, as chief executive officer of its WarnerMedia unit starting in May, when it plans to launch its HBO Max service to compete with streaming heavyweights Netflix and Disney+.Kilar's appointment underscores how important winning the streaming wars is for the U.S. telecoms giant as Americans stay indoors to avoid catching or spreading the coronavirus. Time spent on streaming services has surged over..