This is a YouTube Channel Notifier, a tool that monitors your favourite YouTube channels and notifies you whenever they upload new content. It helps you stay up-to-date without constantly checking YouTube.
Follow the detailed instructions in the GitHub repository. You'll need to host it yourself, but the setup process is straightforward and well-documented.
This project is completely free and open source. You only need to cover the costs of hosting it yourself, which can be very minimal or even free depending on your setup.