Toolkit for YouTube with 130+ options accessible via settings panels. Key features include: tab view, playback speed control, set video quality, export transcripts, prevent autoplay, hide shorts, hide ad slots, disable play on hover, square design, auto-theater mode, number of videos per row, display remaining time—adjusted for playback speed and SponsorBlock segments, persistent progress bar with chapter markers and SponsorBlock support, modify or hide various UI elements, and much more.
YouTube has been implementing stricter anti-adblock measures recently, which is all over Reddit. I've never received an adblocker warning while using the script, so I can't investigate this on my end.
In your video, the Tampermonkey script count jumps from 29 → reload → 15 → 23 → reload → 14 → 22. Any of the other scripts could be interacting with YouTube’s detection system as multiple scripts were being enabled and disabled during the reloads. Additionally, YouTube occasionally displays the warning but then omits it for a few videos.
To properly isolate the cause, I recommend disabling all other scripts and any adblocker you might be using, then testing again across multiple videos. Otherwise, there are too many confounding variables to determine the actual cause.
As one lead, see this thread and see if there's any scripts that enable code similar to "Hide Sponsored videos & promos".
The script has optional toggles to hide ads that appear in suggested-video slots: Hide Ad Slots on the Home Page (default: no), Hide "Pay to Watch" Featured Videos on the Home Page (default: no), Hide "Free with ads" Videos on the Home Page (default: no), and Hide Members Only Featured Videos on the Home Page (default: no).
The corresponding CSS selectors are:
.CentAnni-style-hide-ad-slots
.CentAnni-style-hide-pay-to-watch
.CentAnni-style-hide-free-with-ads
.CentAnni-style-hide-members-only
.ad-interrupting
.ytp-ad-persistent-progress-bar-container
If those options are already disabled, YouTube might be scanning the script for specific keywords. In this case, delete the CSS blocks.
script worked perfectly well until yesterday. I started receiving ad-block messages. i investigated and turns out the script is triggering the ad-block message. https://streamable.com/l4fpwb