Adds quick Watch Later button
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."
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 array.
