Video ad viewability and fraud continues to taunt marketers looking to add video content to marketing strategies. It revolves around the pressure to make sure ads are served and seen. Good news for marketers: the percentage continues to rise, per studies. Digital video ads that were in-view during Q4 2014 for desktop and mobile in the United States reached 39%, up 9% sequentially, per eMarketer, citing stats from Integral Ad Science. eMarketer estimates U.S. digital video ad spending will rise by 30.4% this year, up from 56.0% in 2014.