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Mark Watched YouTube Videos

Add an indicator for watched videos on YouTube. Use GM menus to display history statistics, backup history, and restore/merge history.

How to install

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

How to install

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

Author
jcunews
Daily installs
1
Total installs
3,011
Ratings
40 0 1
Version
1.4.69
Created
2017-06-02
Updated
2025-12-04
Size
18.2 KB
License
AGPL v3
Applies to

  • Use ALT+LeftClick or ALT+RightClick on a video list item to manually toggle the watched marker. The mouse button is defined in the script and can be changed.

  • For restoring/merging history, source file can also be a YouTube's history data JSON (downloadable from https://support.google.com/accounts/answer/3024190?hl=en). Or a list of YouTube video URLs (using current time as timestamps).