Sure, it may not be the best and most efficient way to deliver specific content
You cannot teach somebody complex technical subjects by feeding them video and audio only; it just does not work. Every human learns in a slightly different way, and have a slightly different knowledge base, and need to dynamically adjust their focus to their personal needs. This is why video and audio alone are not suitable for tutorials. This is also why just sitting in college or university classes and only listening won't get you far: you need to delve into the material on your own, and get a somewhat intuitive grasp on it, so that you can apply the knowledge as a tool. Being able to recite information but not apply it is useless.
Experiments, tips and tricks, showing details and "traps for young players" that often is gained only via real world experience, and so on, are not tutorials. They are much less information dense, and are structured much more like a story. The high points are often easy to note, and their conveyed details easily integrated; but only if the surrounding story supports it. The viewer/listener is a passive participant, "experiencing" the story; in the best case, like watching over the shoulder of a seasoned professional. It can be a very important part of the whole machinery of learning, but it alone does not suffice.
It is sheer idiocy to believe videos and/or podcasts alone could suffice. Humans do not work that way. You can learn a lot of stuff that way, for example languages, but not everything; and especially not complex creative tasks or technical subjects. Those require more fundamental changes in the human mind than mere passive observation can induce.
You can glorify quick-and-easy media as much as you like, but the simple fact is that if you base your technical learning on Youtube videos, it will be superficial and poor indeed. And it is not because the videos are poor, it is because they are unsuitable for the task because of how human learning works.
If your only tool is a hammer, every problem looks like a nail, so I guess it is easy to think videos alone work, if they make you forget all the other work you've done to learn.
It is true that pure text and pictures is not as effective as text and pictures with an occasional story highlighting an important point, or explaining a crucial detail in another way. Having those as videos with a much less dense information content, with a story-like structure, really REALLY works. Most of you have also read old-style books, with interesting anecdotes or snippets sprinkled in, making the material much more approachable and sometimes even enjoyable; and those without, like reading an old phone book. Or have wondered about a specific type of circuit, and have found an EEVblog video exploring it, and had the overall picture just "click" together.
Yet, while those videos and anecdotal text snippets and stories can be critical for learning results, they aren't the whole matter, only the highlights.
I'll try not to try and belabor this any further; probably shouldn't even post this... If anyone is interested in exactly why I believe the above is true, feel free to delve into
pedagogy and
learning theory.