Would you believe me if I told you that I learned many languages, studied technical engineering and computer science and work as a Web/C# Developer for a big company atm. without ever taking up a single book or watching a video? Because that's a fact. I learned everything I know by reading docs and trying out stuff on my own. The most important part of the docs is the "Getting Started" section, and from there I go and google everything I need and do not know. I do not believe in learning from videos. Who made the video? How much do they even know? Are they certified? How well did they prepare the video? Can you remember all the important (theoretical) stuff just from hearing it? But with docs you know that someone wrote it who knows what they are talking about. Because that's the way I learn, my latest project is building a specialized game engine directly on top of Vulkan. Yeah, there is no documentation, only samples. But what about it? I am used to read source and try stuff out myself.