It marks clearly watched videos. It's easy to export and import watched videos from a browser to another.

I can't even remember what Youtube is like without this addon. Incredible work.

Very useful, nicely structured, would be 5 stars if
1) it didn't slow YT videos to an almost complete lag; (database 4495)
---Would marking the text (purple or red) instead of the image use less resources?
---I have many unloaded tabs of videos, is something collating all those unloaded tabs each time?
2) it said when each option marks a video- do any mark when they are queued? When do the YT options mark them? When does history matk them
3) once you have a collection in memory, which ones are needed to update it?

Great app. Easy and smooth to use.

Suggestion : Would love an option to change the date stamp format to dd / mm / yyyy. The default one is kind of backwards...

:)

Very useful tool !
Thank you

Works great in standard desktop mode, does not work when viewing youtube from the mobile feed, on a computer and a regular browser....

Works even on different computers. You only have to log in to your gmail and you see all the marks videos you´ve watched on another computer

Handy extension that actually fills a real need rather than just adding fluff! Two nice additional features would be 1) The ability to mark a video "unwatched" and 2) The ability to set a threshold (in seconds, maybe?) after which the video is marked "watched". Right now, simply loading the video (but not even playing it) marks the thumbnail as watched. Great extension nonetheless.

extremely useful and works perfectly. the only thing i miss is an easy way to regulate how much the thumbnails of watched videos get dimmed. otherwise an A+ extension that i hope lives forever.

Please add an option to have the extension hide the mark the videos as not interested or hide them in some way please.

Love the add-on, but I recommend few QOL changes after testing it for a day or two, to avoid annoying new users:


1) By default, only these Conditions should be enabled:

- Mark a video as watched once it appears in the browser's history.
- Mark a video as watched once it has the official Youtube watched badge.
- Mark a video as watched once it appears in Youtube's watch history.

1) By default, only this Visualization should be enabled:

- Mark watched videos by slightly fading the thumbnail out.
- Show a textual badge in addition to graying out watched videos.




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I recommend this because I was REALLY annoyed that just opening a video by default marked is at "Watched". I'd rather the video actually watched, is labeled watched, because opening a video to watch it later in a tab marks it as "watched" (maybe add option to delay "Watch" status after a video is opened?).

So that means, with default visualizations options on, suddenly all videos I opened in a tab and didn't watch instantly, show up with grayscale, no YouTube bar, "WATCHED" label on the channel. So now I have no idea which video I actually watched (YouTube bar is a must ON to track this) because every thumbnails is generic looking grayscale. Faded thumbnails work better by default than grayscale (though option to "desaturate" thumbnails a bit would help too)

TBH, I admit, I did not check options initially because there are so many extensions running that the small blue icon didn't even show up on Toolbar for me, it went into overflow. There was no "Options" option when I checked the addon in "Addon & Themes" panel, so I assumed there were no options for this addon, and browsed away oblivious to the fact that there were definitely options.

I hope that is fixed too. Options should be accessible from Addon and Themes section as well when checking extension.



PS: Still a very useful extension. Turning off these extra options made it actually more useful to me than when everything was checked by default.