Description:Rob Norman, the newly named Global Digital Officer of GroupM, the giant WPP media unit, and Brett Wilson, CEO of TubeMogul, a video advertising services company, will keynote a half-day conference on the state of Real-Time Bidding (RTB) and video advertising, on Thursday, September 27 in New York at the GroupM offices. The State of RTB While some analysts argue that programmatic buying will become the norm, many premium publishers such as cable networks and big portals prefer to manage their own(4:15)