This has nothing to do with the "reach" and "power" of video, and everything to do with the fact that video ads are more valuable. Source: I work in online advertising.
Video is a supply- rather than demand-side phenomenon. Or rather, it's an interaction between publishers and advertisers rather than publishers and readers.
Video is a supply- rather than demand-side phenomenon. Or rather, it's an interaction between publishers and advertisers rather than publishers and readers.