One of the lesser-known facts about the video advertising industry is that the ad ecosystem’s knowledge of the content is limited to literally just the page URL that the video is being viewed on. This
is in part due to the business model that online video grew up with, which centers on traditional demographic ideas: If I can get the right audience, why do I even care about the content, since I’m
getting the right user? This kind of approach might work in display, but it’s actually missing a huge piece of data in video.