YouTube Remove/Hide Watched videos from Subscriptions page (Bookmarklet)

youtube-remove-watched-videos-from-subscriptions.js

///////////////////////////////////////////////////////////////////////////
// Scripts to hide already watched videos from YouTube subscriptions feed

// Removes videos counted as "Watched"
document.querySelectorAll('.yt-lockup-thumbnail.watched').forEach((e)=>{e.parentNode.parentNode.parentNode.remove()});
document.querySelectorAll('ytd-thumbnail-overlay-resume-playback-renderer').forEach((e)=>{e.parentNode.parentNode.parentNode.parentNode.parentNode.remove()});

// Removes videos which you've started watching (but not completed)
document.querySelectorAll('.yt-lockup-thumbnail.contains-percent-duration-watched').forEach((e)=>{e.parentNode.parentNode.parentNode.remove()});