YouTube test threatens to block viewers if they continue using ad blockers

They can do this without this new API though. Many sites block users if they use ad blockers, have for years, and that’s without this API.

How well is uBlock Origin working for you in Chrome Mobile?

Chrome isn’t the only browser on mobiles. If Chrome doesn’t let you block ads and you want to block ads, use a browser that does. Based on your logic, google would have eliminated ad blockers from Android overall already, yet they haven’t.

The fact is that this new API doesn’t block ad-blockers. Sites can already choose to block access if you have an ad blocker. There’s no change.