Due to the complexity and ever changing nature of the way that ad revenue is generated in YouTube's platform, it is not possible to provide an exact amount.
When YouTube places advertisements on videos in their platform, those advertisements are paid for by companies that paid YouTube a bid price to compete with other companies that also want to advertise their products/services on those same videos. The highest bidder (ie: The company willing to pay the most for those ads depending a number of factors) will have their ads shown and the price they paid at the time they won the bid price will be the ad revenue by which YouTube calculates their payout.
Alternatively, users that are subscribed to YouTube Music will not see ads when they view videos in YouTube because they are paying a monthly subscription. When views occur from YouTube Music subscribers, the revenue earned is determined by the total subscription revenue pool and a pro rata share of that subscription revenue based on the number of a views that a video receives.