I learned from books and because of that I feel confident in the things I program. Which learning method did you use the most? Let us know in the comments what it was, as this can help other people to follow more efficient learning paths. 
Both can be helpful, but written works are easier to refer back to.
and their approval is also very important for quality content. Let's imagine that a book needs some kind of censorship in order to be sold, something that won't happen to a video published on YouTube.
Articles, walkthroughs, books, have always been better for me. Lets me jump around to what i need faster. If the person is a good author you will be able to follow along with it just as well as if you were watching it live. Also i used to have even worse internet then i do now and i just couldnt stream and downloading took too long comapred to saving a webpage or e-pub