Pi hole not blocking youtube ads

Pi hole not blocking youtube Ads, Few days back It was blocking youtube ads, but I think the regex needs to be changed for the youtube ad URL.

Does anyone have the latest regex or URL to block youtube ads

Also, how do I get the Youtube AD URL?

Blocking ads on YouTube is not possible with Pi-hole. Lot have tried, all failed in the long run.
YouTube serves ads from the same domain as video content. Therefore, it is not blockable on DNS level.