Over-the-top (OTT) TV devices like Roku players, Apple TV boxes, and other OTT devices are leading the way in online ad view share, according to a new report from FreeWheel. The Comcast-owned multiscreen advertising firm said that for Q1, OTT has grown from 2% to 32% over a four-year period, Multichannel News reported. "In Q1, nearly all the device growth came way of OTT devices and set-top VOD. ...Ad view composition and growth on OTT devices surged 45% year-on-year, and 33% for set-top VOD, and while dropping 5% on desktops/PCs," Multichannel reported.