Or, to spin it around -- given a standard, naive population, why are video platforms so much more successful than text ones?

Hypothesis: video is more addiction, regardless of content

Except I can read much faster than a video can convey information to me, almost always - I suspect the popularity of video to deliver information at least in some part stems from declining literacy. Whenever I have to watch a poor reader read something, I am honestly amazed they can function at all.