The evolving landscape of web development is characterized by a state of constant progression. The tools, libraries, and systems used today may be outdated in a year. This rapid advancement has helped create a culture of learning within the industry. As a developer, the question isn’t what you will learn but how do you learn best, because you will always have to be learning.
Personally, I have found that I grasp a concept in much more detail by combining documentation with a video tutorial. Watching someone put into practice the steps I had only previously read helps to cement an idea or technique in my head. That said, there is no better way to truly grasp a concept than to write the code yourself.