YouTube Watch Later Duration Sorter

Sort your YouTube Watch Later playlist by video duration, either shortest to longest or longest to shortest, with a simple click. A backup is made before sorting in order to be able to restore the content of the playlist if an issue occurs during the sort process.
The extension only allows to sort/backup/restore Watch Later playlist.

v1.8
Collapsible keyword section: click the "Keyword grouping" header to collapse or expand the chip input — state is saved per account
Enable/disable toggle: a switch in the keyword header lets you temporarily disable grouping without removing keywords

v1.7
Settings popup: click the extension icon to manage settings (confirm before sort, auto-backup, max backup history, keyword grouping toggle)
Keyword grouping: add keywords to group matching videos (by title or channel) at the end of the sorted playlist, with drag-to-reorder chip priority
Export & import backups: save any backup to a JSON file and reimport it later (file picker or drag-and-drop)
Delete individual backups from history
Fixed button injection failing after the first sort
Fixed progress overlay appearing when cancelling the sort confirmation dialog

v1.6
Backup history: keeps up to 5 backups with labels and timestamps, viewable in a History panel
Export & import backups: save any backup to a JSON file and reimport it later (file picker or drag-and-drop onto the History modal)
Delete individual backups from history
Account isolation: backup and sort data is now scoped per Google account to prevent cross-account conflicts
Fixed HTTP 400 errors on repeated sorts caused by stale playlist cache

v1.5.1
Fixed incorrect sort order caused by live video

v1.5
Updated Button Styling: Refreshed button appearance and placement for better integration with YouTube's UI
Refactored Playlist Sorting: More robust sorting algorithm that reconstructs the playlist for reliable ordering

v1.4
Added an overlay that provides details on the steps during the sort process

v1.3
Added backup and restore functionality

If you like my extension and want to support me, you can use this link to make a donation ;)
https://www.paypal.me/megyland