I'm under the impression that it is against terms of service to ask people to click your ads.
As far as google knowing.... Dude... There are bajillions of vids. The dude would simply have been lucky.
If what I've heard is true, listen to him and just spam click it because that apparantly makes him lose the ability to use adsense.
Oh snap! Sorry!!! Don't do it then! IGNORE ME!do not do this as youtube tracks ip's and accounts if he is a big youtuber they will message him first and band you