I do both video and written books in other contexts (in fact I own a small book publishing company called Purple Squirrel Productions.)
I would simply say that different people learn things differently. But I agree that YouTube videos can be boring for me. That is especially true of "do this exactly" instruction videos. I'd rather a online doc that I can cut&paste from. For that reason, I try to infuse my videos with the philosophy of why things are the way they are. I want to give things a sense of context or history that helps explain things. I remember in one of my Python db driver videos going on a small rant about the horrible and misleading the naming of sequences in JS and JSON and how that propagated into BSON and MongoDb. Oddly, people seemed to appreciate that rant.
