Minimal. Simple. Sufficient.
Enables shortcuts to add and remove currently watching video from the Watch Later playlist.
For Mac:
- ⌥ Option + ⇧ Shift + L to Add
- ⌥ Option + L to Remove
For Windows:
- Alt + ⇧ Shift + L to Add
- Alt + L to Remove
For Chrome OS:
- Alt + K to Add
- Alt + L to Remove
Shortcuts can be changed in the extension's options at chrome://extensions/shortcuts
As a result, the notification should appear: