If im not mistaken, yt serves ads from its first party domain, making it hard to block from a dns perspective. Blockers such as uBlock do it by blocking elements or code, not dns lookups.
Cool, that makes sense. I have quite a few false positives with Google Ads.
Like the other person said, these are basically unblockable by DNS and if you block them by other means it causes a lot of “collateral damage”.