I despise videos when I want to learn something. Give me a nice text (+ pictures if a subject requires it) so I can follow at my own pace: slow down, skip or skim as needed.
For other things (e.g. repair a part on a bike) text requires images, to really be able to quickly grasp what one has to do.
Finally, for learning e.g. dance moves I really want a movie (or a live instructor).
So like usual "it depends".
