Youtubes biggest problem, is also its greatest strength, its size.
A good animation isn't easy to find, usually overshadowed by the other thousands of uploads, 90% of them silly crap thats an imitation of silly crap. Not to mention the sad reality is that you can spend months working on a toon that means the world to you, someone can spend 10 minutes making a silly video and do infinitely better than you because in the 3 months you spend animating, this other guy can put out 10 or so silly crap videos, get a partnership with youtube and make a few bucks while you get maybe 35-100 views for your endeavors...and maybe a subscription or two from the one or two people who enjoyed your work.
Its sad because in a way, Youtube kind of supports mediocrity and sloth as its these same silly crap videos that make people lots of money, fame, and "respect". I don't know anyone who respects clowns like Shane Dawson,Ray William Johnson, or the other Youtube stars.
Yes, Youtube also does support real talent, but the percentage between talent and silly crap is like 70% crap, 5% talent, 25% porn links and vids.
I'm all for silly crap, as silly crap is fun...but you can do so much more with it than quick edited monologues and bad skits with 6th grade humor. Theres not much skill to that, but when you animate it, its something different entirely. Its not a clown standing in front of his camera who can't remember his own script, its an animated world where anything can happen and you can make it happen.
Like Harry Partridge said "with animation, You can". He's absolutely right. Sadly, very few animators get much success on youtube, swallowed up by the thousands of other uploads. Youtube is not very supportive about its animation community and its draconian adsense policies(click fraud accusations that have no merit is still common) among other things are just another nail in an evergrowing coffin.
Youtube is past its prime, even though its still growing, its newer changes and "features" make it a tiresome mess to navigate,use, or even enjoy.
Best thing we can do is try to get youtube viewers over to newgrounds, theres a lot more to offer here than at Youtube, the honest to god talent on newgrounds still drawfs the overwhelming silly crap on Youtube.