SkipSeenWhy YouTube autoplay replays videos you've already watched
Updated September 29, 2026 · By Keenan Kaufman
Short answer: if YouTube keeps playing videos you've already watched, it's because YouTube picks the next autoplay video mainly from the video you're watching right now, and it has no setting that excludes videos you've already seen. Your watch history tells YouTube what you like; it isn't a filter. You can turn autoplay off, or flag repeats one at a time with “Not interested”, but only a browser extension such as SkipSeen can skip watched videos automatically, and only on desktop.
Why it happens
YouTube says its system “uses the video you're currently watching as the main signal when suggesting a video to play next” (YouTube Help). Your history, subscriptions, likes and “Not interested” feedback are also signals, but they shape what YouTube thinks you'll enjoy. Nothing in YouTube's documentation says videos you've already watched are removed from Up Next.
YouTube has described watch time — “which videos you watched and for how long” — as a signal of “what you most like to watch” (YouTube Blog). Our reading, not YouTube's: a video you watched through is strong evidence you liked that kind of video, so it's easy to see why close relatives of it, or the video itself, keep turning up next to it. YouTube hasn't published an explanation of why already-watched videos resurface, so treat any confident answer to that with suspicion.
What YouTube's own settings actually do
1. Turn autoplay off
- Desktop: on any video, click the Autoplay switch at the bottom of the player.
- Mobile app: tap the Autoplay switch at the top of the player, or go to your profile picture → Settings → Autoplay.
- TV app: Settings → Autoplay.
The catch: it's all or nothing. It stops the repeats by stopping every next video. It's also set separately on each device, and YouTube turns it off by default for users aged 13–17 (source).
The full guide to turning off autoplay also covers videos that play as you scroll and turning it off for a child. If autoplay won't stay on, see autoplay not working.
2. “Not interested” → “I've already watched the video”
On desktop, click More next to a video on Home, choose Not interested, then Tell us why → I've already watched the video. On TV, press and hold select on a video on Home or Watch Next to get the same options (source).
The catch: it's one video at a time, after the repeat has already appeared. YouTube describes it as feedback that “helps to inform what to avoid recommending”, not a guarantee that autoplay won't pick the video again.
3. “Don't recommend channel”
Available from the More menu on Home and Watch Next (source). The catch: it blocks the whole channel, including new videos you'd want. It's the wrong tool if you like a channel but not its repeats.
4. Pause or turn off watch history
On desktop, My Activity → Controls → turn off, or untick “Include the YouTube videos you watch.” In the apps: profile picture → Settings → Manage all history → Controls (source).
The catch: YouTube says that with history off and no significant past history, recommendations on the homepage are removed. And our reasoning: if YouTube isn't recording what you watch, it has even less to go on when avoiding repeats.
5. Delete videos from your history
Click the X next to a video in My Activity (desktop) or Settings → Manage all history (apps). YouTube says it “won't base future video recommendations on that content” (source). The catch: that stops the video influencing recommendations; YouTube doesn't say it stops the video being recommended.
What about Mixes?
YouTube calls a Mix “a nonstop playlist tailored to you” (source). YouTube doesn't document why Mixes repeat videos or how the Autoplay switch applies inside them.
At a glance
| Option | Keeps autoplay | Stops repeats automatically | Desktop / mobile / TV |
|---|---|---|---|
| Autoplay switch off | No | Yes, by stopping everything | All three |
| Not interested → already watched | Yes | No, one video at a time | Documented for desktop Home and TV |
| Don't recommend channel | Yes | No, blocks the whole channel | All three |
| Pause watch history | Yes | No, and loses the home feed | All three |
| SkipSeen extension | Yes | Yes | Desktop only |
Skipping watched videos automatically
That gap — keep autoplay, lose the repeats — is why SkipSeen exists. It's a free extension for desktop Chrome and Firefox. When autoplay moves on to a video you've already watched, it presses Next for you. It counts a video as watched at 30% (adjustable), picks up videos you watched before installing from YouTube's red progress bars, leaves videos you click on yourself and playlists you chose alone, and keeps your history on your device. The how it works page has the exact rules, and the comparison shows how it differs from hide-watched extensions.
On the YouTube mobile and TV apps, extensions can't run, so the built-in settings above are the only options there.
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