I know there was a thread recently on this or similar topic, I'm unable to locate it to share or tag it in.
https://www.ghacks.net/2025/06/09/googles-fight-against-ad-blockers-on-youtube-enters-another-round/
Ding, ding, ding. Google has done it again. YouTube users from all over the world are starting to see new anti-ad-blocking prompts, when they try to watch YouTube videos with enabled content blocker. This looks like an exact copy of the March 2025 attempt to get ad blocking users to disable their content blockers or subscribe to YouTube Premium.
The message reads "Ad blockers violate YouTube's Terms of Service", followed by three reasons why video playback may not be working and why ads are great. Also, why YouTube Premium is an option for users who want to go ad-free (not YouTube Premium Lite, which requires payment but still shows you ads, and soon even more ads).