Okay, @TeamYouTube; this isn't funny anymore. Somebody somewhere is logged into my YT account on a browser and keeps disabling my watch history. I see vids occasionally pop up that are 100% not viewed by me. How do I log out of YT everywhere to ensure they can't continue?!?!?!
Understood. Check out the 'Sign out from another computer' section of our Help Center resource to sign out of other web sessions: https://goo.gl/nHyadK . Also, if you're using a shared computer, consider signing out of any Google service when not in use. Hope this helps.