I'm happy to report that the vote was postponed because they did not have the votes for the proposal to pass. I know it is not a definitive victory because they will simply try to do it again, but it's good that they failed once again.

As I understand it, detecting an adblocker is a form of fingerprinting. Fingerprinting like this is a privacy violation unless there is first a consent process.

The outcome of this will be that consent for the detecting will be added to the TOS or as a modal and failing to consent will give up access to the service. It won't change Youtube's behavior, I don't think. But it could result in users being able to opt out of the anti-adblock... just that it also might be opting out of all of YouTube when they do it.