Most stuff on youtube isn't worth a dime any way... Hateful or not.
I don't know about most stuff. I find the tutorials on how to do stuff around the house pretty useful when the washing machine won't drain. Also, there are some rare clips of musical performances from years gone by that are impossible to find anywhere else (Bill Evans Quartet playing in someone's living room in Finland comes to mind)
But the videos advertisers are running away from are the ones where some guy in his mom's basement is looking into a camera and telling you his Very Important Opinions on why bitches are ruining video games or something.
If you read some of the AC comments above "The blacks have lower IQs. FACT!" you get an idea of why the entire YouTube jackoff culture might turn off people with money to spend (advertisers). I'm not sure it's fair to blame Google or YouTube for the fact that the advertisers choose to look for other avenues.
By the way, here is an excerpt from the Bill Evans video I referenced. For jazz musicians and fans, this is like finding the Dead Sea Scrolls. Eddie Gomez is especially impressive on bass.