This is explained on this support answer
It’s a thing on Revanced YT even if spoofing an old version.
Apparently applies to the web version?
This is explained on this support answer
It’s a thing on Revanced YT even if spoofing an old version.
Apparently applies to the web version?
Messed around with it. If I have zero video history and turn it on it has accurate recommendations, based on videos I’ve recently watched (while watch history was disabled).