Google knows just a wee bit about display ads and a wee bit about video ads. But how do the two mediums play together? In its recent report, Display Business Trends: Publisher Edition, the search giant analyzed “tens of billions” of impressions across its publisher products including DoubleClick for Publishers, the DoubleClick Ad Exchange and the Google AdSense network. With video in particular, Google found several trends that may be useful for publishers to keep in mind as they peddle video ads. For starters, video advertising is one of the fastest growing segments in digital advertising, the report said. Google’s not the first company to note the rapidity of video’s growth; but corroboration from the Web behemoth on what countless other reports say is a good thing for the video ad business.