Hi there!

Thank you for your review! In regards to your points:
- Some notifications do not allow adding to the Watch Later playlist, but I don't know if that's the case here. I would need more information in order to be able to investigate this.
- I'm writing this down as a feature request!
- I'm adding this to the backlog. I can't make any promises, but I'll have a look.

If you have any additional information you can provide me about any issue you're experiencing, feel free to create an issue on GitHub, or check the website for other ways to contact me.

Thanks for using my little extension! :)