I had the same hypothesis as you about the generational preferences kind of thing, but personal anecdata seems to run against it. I am in my mid twenties, have

I had the same hypothesis as you about the generational preferences kind of thing, but personal anecdata seems to run against it. I am in my mid twenties, have plenty of friends spanning from early twenties to early thirties (with a few in their late 30s/early 40s), and have noticed zero correlation between the age and their willingness and preference to learn things from youtube videos vs. written sources. Not accounting for some specific types of things (e.g., I cannot for the life of me learn intricate details of operating physical things like fixing something on a motorcycle without a video, despite heavily preferring written sources for learning otherwise), the general preference for learning through youtube vs. reading seems to come down (at least from what I've observed) purely to the individual's own preference.