Update lite_youtube Library

Configuration forms could be used to implement this solution and directly assign the library URL.

@jleon1110
Thanks for your MR. I’ve reviewed the code and left a few comments.
I believe this MR is missing two important cases:

• Handling for existing sites
• Setting a default value

You can add a config/install/lite_youtube.settings.yml file with the default configuration. This file will be loaded when the module is installed and will set the initial values.

Additionally, you need to create a hook update to update the configuration for sites where the module is already installed.