YouTube Playlist Duration bar is a free Chrome extension developed by WaiShen. It is categorized under Browsers and falls into the subcategory of Add-ons & Tools. This extension provides a progress bar that displays the progress and duration of YouTube playlists while watching videos or viewing playlists.

The extension automatically updates the calculation when videos are added, deleted, reordered, or when a new video starts playing. It works with any type of playlist, including public or private playlists, Watch later, and Liked videos.

While a video is playing, the extension shows the total duration, watched time, watched percentage, and remaining time. When viewing a playlist, it displays the total duration and the number of videos counted.

If you have any suggestions or want to report a bug, you can contact the developer via email or leave a message in User support. Please note that after upgrading the extension, you need to refresh all YouTube pages.

Please keep in mind that the extension only counts videos in the playlist panel, and YouTube's UI typically loads around 200 videos into the panel. If the number of videos counted does not match the actual number of videos in the playlist, you may need to scroll down to load more videos or some videos may be hidden by the YouTube UI.