The other aspect I wish we had youtube when I was younger:
It sets a bar of where skills really are.
As a teen in the 80's, you listen to the radio, and ok, it was Bon Jovi, Guns and Roses, etc, and I'm all "ok, I can do that". Turn on MTV, and it's pretty much the same thing. OK, along comes Lars, I'd better learn some double bass. OK, got it.
And sure, you could get a cheap tape recorder and check yourself, but it was difficult to get much if any, real feedback on where you were as a player. And it was easy to think you were better than you were.
Sure, I was into Peart and knew about Weckl, Vinnie, Simon Phillips, etc, but they all seemed to be way out there, more of an exception than the rule.
If in 1988, you asked 50 drummers who are the top 20 current drummers in the world, sure, the order would be different, but all 50 would have a similar-ish list.
But now with YT, one can see there are a lot more highly, highly, highly skilled drummers out there. Competition is high. Just getting away with being to play the songs on the radio isn't going to cut it in the real world.
Now if you asked 50 drummers who are the top 20 current drummers in the world, the names on these lists would be all over the place. You might end up with 1000 different names if you complied them all.
Kids today have to practice more. They need to bring more talent. You want to know how you're doing? It's easy to make a video. It's super easy to check out 500 drummers at the same level as you and see where they are. Gut check time. If you need to practice more, there a ton of examples out there as to why you'd better practice more.
Not feeling it today? Here are a thousand more drummers on YT to motivate you.
If you think you really have your stuff together, a reality check is just a few mouse clicks away.
In 1988, I would have killed to have access to something like youtube.