Watch Later Shortcut for YouTube™ is a free Chrome add-on developed by Mykhailo Zachepylo. This add-on allows users to add and remove the current video from their Watch Later list using convenient keyboard shortcuts.

For Mac users, the shortcut to add a video to the Watch Later list is ⌥ Option + ⇧ Shift + L, while the shortcut to remove a video is ⌥ Option + L. Windows users can use Alt + ⇧ Shift + L to add a video and Alt + L to remove a video. ChromeOS users have the shortcuts Alt + K to add a video and Alt + L to remove a video.

When a video is successfully added or removed from the Watch Later list, a notification will appear to inform the user. The extension also allows users to customize the shortcuts in the extension's options, which can be accessed at chrome://extensions/shortcuts.

It's important to note that this extension is designed to work with the desktop version of YouTube™. Updates to the YouTube™ website may affect the functionality of the extension, so users are advised to be patient for updates.

Please note that YouTube™ is a trademark of Google Inc. and the use of this trademark is subject to Google Permissions.