"click your profile icon in the top-right of YouTube and choose Your Data In YouTube again. Scroll down to YouTube Watch History and click the field labeled On.

"click your profile icon in the top-right of YouTube and choose Your Data In YouTube again. Scroll down to YouTube Watch History and click the field labeled On. There, you can choose the Turn off option" -- Another method is to set Auto-Delete to 'anything older than 3 months'.