Adds quick Watch Later button with customizable playlist
IMPORTANT: Please use the updated script if you have received the October 2025 YouTube UI update: Link to script
It adds a "Watch Later" button to YouTube video pages, allowing you to add videos to your "Watch Later" playlist with a single click. This works by automating the process of clicking the menu, selecting "Save," and then adding the video to "Watch Later."
You can change which playlist the button saves to in two ways:
Method 1: Right-click the WL button - Right-click on the "WL" button that appears next to YouTube's like/dislike buttons. A modal will appear showing your current target playlist and all other playlists. Select the playlist you want the "WL" button to save to.
Method 2: Use Tampermonkey menu - Click the Tampermonkey icon in your browser toolbar, then select "Change Target Playlist" from the menu, the same modal as method 1 will appear.
Note: I have added multiple different translations of the "Save" button text in the SAVE_BUTTON_TEXTS variable. If the script is not finding the save button, then edit or add the save button text of your language in that
