this extension is calculating total time of all videos in youtube playlist which you are watching
https://chrome.google.com/webstore/detail/youtube-playlist-total-du/khojmgiiphnllfcdgkccmdhkfkccnhlo
this extension is calculating total time of all videos in youtube playlist which you are watching
https://chrome.google.com/webstore/detail/youtube-playlist-total-du/khojmgiiphnllfcdgkccmdhkfkccnhlo
MIT License