It can be quite difficult to follow programming topics over audio only, so it's not interchangeable with video in this case.

Another big driver to move from text to video: It is easier to monetise video via YouTube compared to a blog. People with millions of subscriptions on YouTube aren't creating FE learning material out of the goodness of their hearts; it is a big business. Also, video is almost always lower information density compared to text, so it is easier for your net to capture more customers.

And you can't just search in it. It's truly trashy format for anything other that presentation or lecture. For simple information sharing it's horrible.

We millenials ruined the doorbell industry by texting “here”. (Always connected)

Gen Z just sends you a picture of your door. (Mobile broadband)

What we perceive as the best way is often just driven by the technology available when we learned how to operate in the world.

I think you nailed it.

Another example of advertising destroying the world.