(It always seemed like I learned it, but when faced with the problem sets I discovered I hadn't learned anything yet.)
It's the same with everything. You can watch a yootoob video on rebuilding a carburetor all day, but you don't know nuttin until you take it apart yourself.
I decided to learn to ride a dirtbike. I took some personal instruction from an expert, and promptly crashed. Again and again and again. Finally, my body figured out how to coordinate the controls.
Can't learn how to double clutch downshift from watching a video, either.