>The density of information delivered via video (visually) in addition to the word messaging (via audio) is roughly 10-100X that of an all text recipe.

I think you need to show your work on that calculation - because I'm worried it's going to be one of those 'a video has so many bytes of information per frame etc. etc.' claims at which point I would have to wonder why I care what color Julia Child's blouse is when preparing an omelet.