Sorry if I was unclear. There is no singular optimal way of teaching. But for every subject, there is an optimal way to teach it. And usually that optimal way is a combination of visuals, auditory, reading, etc.

Way too often, someone achieves understanding when information happens to be presented in an optimal way for that information and they instead believe that the way was optimized for them rather than for the information.

Then they get stuck on "I need to watch videos to truly understand it".