what is youtube watched videos hider? it is an small piece of software that will hide watched youtube videos from youtube site, this will give you clean list, stop wasting time in old videos and start discovering new things you can go to addon setting to set your channel ID to avoid hiding your loved songs/videos etc.. note: https://www.youtube.com/feed/history will not hided, To avoid this feature become useless in youtube for firefox https://addons.mozilla.org/en-US/firefox/addon/youtube-watched-videos-hider/ she also available as user script for other browsers: firstly download user script runner add-on for your browser if you don't have it already: https://addons.mozilla.org/en-US/firefox/addon/tampermonkey/ https://chrome.google.com/webstore/detail/tampermonkey/dhdgffkkebhmkfjojejmpbldmpobfkfo?hl=en https://addons.opera.com/en/extensions/details/tampermonkey-beta/ then download the script https://raw.githubusercontent.com/ibtisammidlet/youtube-watched-videos-hider/master/youtube-watched-videos-hider.user.js see preview it working >>gif image