I'm experiencing the same thing. Youtube ads getting around uBlock. I read on the uBlock Reddit page they are working on it. It seems Youtube has found a way to sidestep uBlock. I was getting the message that there was an error on YouTube, but uBlock today said they disabled that feature in order to investigate what Youtube is doing, so you get those ads, but at least you can watch it without disabling uBlock.

uBlock is awesome, Google sucks

its just a beast, internet would be unusable without it.

God! 唯一真神

Recommend using it if you dont like getting ad bombed.