Anyone know if YouTube has it? The number of times I switch the YouTube app to Incognito just to avoid whatever links my friends send from influencing my recommendations…
Removing videos from my watch history seems to work for this. The note on this page[1] seems to indicate that watch history is what's driving your recommendations (they disappear if you don't have enough history):
[1] https://support.google.com/youtube/answer/95725