Hover a thumbnail on youtube.com and click an icon at the right: "Not interested" and "Don't recommend channel"
These are versions of this script where the code was updated. Show all versions.
fixup
fix greasemonkey and violentmonkey content mode
workaround for preview being hidden via external means
fix inline preview
unbork buttons in the inline preview
tentative fix2 for menu staying
tentative fix for menu staying visible in FF
fix scrolling
increased click area
fix click
show inside hover player
reposition icons on small thumbnails
fixed the missing "not interested" button after hovering a mix
Greasemonkey/Firemonkey compatibility