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Calculate the duration of a playlist and display it next to the number of videos
< Feedback on Youtube Playlist Duration Calculator
Try with version 1.1.4. It's updated for displaying in the new YouTube layout now.
Try with version 1.1.4.
Now everything is OK. Thank you!
Mozilla Firefox 109.0b9 (64-bit), Tampermonkey 4.18.1 (16 November 2022) — on the youtube.com/playlist?list= pages the total duration of the playlist is not displayed.