In Forrester's evaluation of the emerging market for cross-channel video advertising platforms, we identified the 13 most significant providers in the category — 4C, Adobe, Amobee, Cadent, Centro, dataxu, MediaMath, Mediaocean, Simulmedia, The Trade Desk, Verizon Media, VideoAmp, and Xandr — and evaluated them. This report details our findings about how well each vendor scored against 10 criteria and where they stand in relation to each other. B2C marketing professionals can use this review to select the right partner or partners for their video advertising needs.