User blog comment:Brandon Rhea/Making Ads Better: The Basics/@comment-24483688-20170116200342/@comment-20644-20170116213722

Similar to another reply I left earlier, my guess is that the reduction of ads on the page would offset bandwidth usage from video ads. So I think the issue you're encountering is most likely more to do with the number of ads on the page in general, rather than one specific type of ad.