SeenTube remembers which YouTube videos you've actually watched — real playback, not just an opened tab — and tells you the moment you run into them again.
Free · Not yet on the Chrome Web Store — install from source for now (instructions on GitHub)
YouTube logs every video you open, whether you watched three seconds or the whole thing. SeenTube only counts what you actually saw.
Open a video, close the tab two seconds later — it's in your history anyway. There's no sense of whether you watched anything at all.
Only unique seconds you actually played count toward "watched." Seeking straight to the end doesn't mark it watched. Neither does opening a tab and walking away.
A small, subtle badge appears right on the thumbnail — on Home, in Search, in Subscriptions, in the related-videos sidebar, and on channel pages. ✓ WATCHED for videos you've finished, a percentage for ones you're partway through.
Click the toolbar icon for a clean, fast view of everything you've watched: how many videos, what's still in progress, and a search box that finds anything instantly by title or channel.
Adjust the watched threshold anywhere from 50–95%, turn watched or partial badges on or off independently, disable the reopen notification, or export/import/clear your entire history as a plain JSON file.
SeenTube has no backend. There's no server to send your data to, because one doesn't exist.
Your watch history and settings live in Chrome's local storage, on your machine, and nowhere else. No account, no sign-in, no analytics, no third-party scripts — nothing to send your data anywhere even if we wanted to.
Read the full privacy policy →