If you're already adept or not looking into things that are challenging to you, then you might just need a list of ingredients. If somebody who has never cooked needs to dice onions for the dish and doesn't know how to do that, YouTube will help much more than any text. There are so many things and aspects that we don't have vocabulary for and is just faster showing.

Videos to teach technique make a lot of sense. Videos to convey a recipe, not so much.