The feature was first reported by users on social media, who received a message stating that their access to a particular video was blocked because they had an ad-blocker enabled. The message suggested that users disable their ad-blocker and refresh the page to access the video.
It is not clear how widespread the testing of this feature is, or if it will be rolled out to all users in the future. YouTube has not yet made an official statement regarding the feature.
The move is likely an attempt by YouTube to increase revenue from ads, which is a major source of income for the platform. Many users use ad-blockers to avoid watching ads before videos, which can impact the revenue generated by YouTube.
However, the move could also be controversial, as many users may find it intrusive or inconvenient to disable their ad-blockers in order to access certain videos.