Yes, I guess it's a bit arrogant to suggest that this one form of media is somehow different from all the others that came before it, and we've somehow finally reached the optimum because YouTube is special for some reason. Nobody can really pretend to know this at present. Maybe I was more imagining what the future would be like if it were true, looking back on the present.
Although, when AOL was around you could only practically use the Internet from a large desktop machine, but now you can access a massive amount of information from almost anywhere using a smartphone. And we're being introduced to computers at a younger age, and are spending more time with them. But that might not be indicative of what happens in the future.