YouTube Check

Marks YouTube videos you've rated (Like or Dislike) with a Viewed badge on thumbnails across the platform.

YouTube Check helps you avoid re-watching videos you've already rated on YouTube. HOW IT WORKS • Open any YouTube video and give it a Like or Dislike • The extension saves your rating locally in your browser • While browsing Home, Search, Channels, Playlists, Shorts, and both the suggested videos and the playlist queue beside the video you're watching, rated videos show a "✓ Viewed" badge on thumbnails FEATURES ✓ Automatic Like/Dislike detection ✓ Mark as viewed by watch time — flags a video once you've watched a configurable amount of it (75%–95%, default 90%), even without rating it ✓ Configurable badge or overlay on thumbnails ✓ Optional: show the full video title on cards, with no "…" cut-off ✓ Full YouTube Shorts support ✓ Floating page counter (viewed/total on the current listing) — reports your progress through a playlist while you watch one; dismissible per page and draggable to any position (double-click to reset) ✓ Watch page indicator ("You already rated this video") ✓ Popup with statistics and recent history — including how many videos you've viewed today, this week and this month; remove individual videos or clear everything ✓ Automatic history cleanup (keep forever, or 30 / 90 / 180 / 365 days) ✓ Export and import your data (JSON) ✓ Settings synced across devices via Chrome Sync ✓ Welcome guide on install and English / Portuguese interface PRIVACY • No data is sent to external servers • Everything is stored locally in your browser • You can clear your history at any time from the extension popup Perfect for anyone who watches a lot of YouTube and wants to quickly see what they've already rated. [ WHAT'S NEW — version 1.8.1 ] • Fixed: Shorts in the Shorts carousel now get the "✓ Viewed" badge too — on a channel's Home tab and in search results, where they were skipped even though the very same Shorts were badged on the channel's Shorts tab • Fixed: the floating counter no longer inflates the total on the Home feed — it was counting the same video more than once • Fixed: a Short saved from a card now keeps its full title and its /shorts/ link