• Pick the type of plugin you want to make, remove the others.
• Fix the SkeletonServiceProvider.php file to include your plugin
• Rename stuff from skeleton to what your plugin is called
• Fix composer.json
• Include in bot

In your main sovereign bot install, run this:

composer require sovereignbot/plugin-skeleton

Add the youtube-player service provider to your config file:

$config['serviceProviders'] = [
    ... 
    Sovereign\Service\SkeletonServiceProvider::class
];

And Restart Sovereign!