YouTube Watch Later is a small extension that adds an 'Add to Watch Later' button to videos and Shorts in some handy locations. Simply install the extension, configure it to your likings inside the popup, and go add those videos to your Watch Later playlist! Have you ever browsed YouTube and used that 'Add to Watch Later' button? Me too. Are you annoyed when you want to use that button, but it is not there? Me too! Would you love to always have such a button, so you can instantly add videos to your Watch Later playlist? ME TOO! -- The button is available in the following locations:

Video/short thumbnails on the homepage, search results, channel pages, and other video lists.
Videos/short notifications in the notification drawer.
(v0.3.0+) Video player controls, next to the like/dislike buttons.
(v0.4.0+) Suggested videos at the end of a video.
(v0.5.0+) Suggested videos on the player page, next to the video (desktop) and below (mobile).

The following general settings can be configured:

'Mark notifications as read' allows for notifications to be marked as read when you add those videos to your Watch Later playlist.
'Logging' allows the plugin to send logs to your console. Could be useful for debugging purposes.

The following button settings can be configured:

'Visibility' allows you to set the visibility of the button to either 'always' or 'hover'.
'Opacity' allows you to set the opacity of the button to either 'full' or 'half'.
'Position' allows you to set the position of the button to either 'top left' or 'top right'.

-- This extension is open source! Links to the source code, and more detailed specifications, can be found on the website.