We know it's negative, because Alphabet has refused to ever publish it, despite doing so for its other divisions. Not to mention their overall revenue is also declining on top of that.

https://www.cnbc.com/2020/02/03/google-still-isnt-telling-us-about-youtube-and-cloud-profits.html

https://www.theguardian.com/technology/2022/oct/26/youtube-battle-with-tiktok-takes-its-toll-as-revenues-dip-alphabet

Do you not know the difference between revenue and profit? Yes YouTube brings in revenue, but it shares a big chunk of it with creators and the left over isn't enough to cover costs. This isn't a surprise to anyone .

YouTube has basically never generated a profit in its entire existence, it's been subsidized by the rest of Google for decades now. If you think splitting off YouTube is gonna reduce the amount of monetization, you're gonna be in for a big surprise.