return [
    'max-size-upload-video' => [
        'type' => 'integer',
        'title' => 'Set Maximum Size Upload Video',
        'description' => 'Set the maximum size upload of videos',
        'value' => '10000000',
    ],
];

class CustomLoadConfiguration extends LoadConfiguration
{
    protected function loadConfigurationFiles(Application $app, RepositoryContract $config)
    {
        foreach ($this->getConfigurationFiles($app) as $key => $path) {
            if ($key === 'video') {
                $values = require $path;
                if (is_array($values)) {
                    foreach ($values as $k => $value) {
                        $config->set($k, $value);
                    }
                } else $config->set($key, $values);
            } else {
                $config->set($key, require $path);
            }
        }
    }
}

protected function bootstrappers()
{
    $bootstrappers = parent::bootstrappers();
    if (($key = array_search($bootstrappers, 'IlluminateFoundationBootstrapLoadConfiguration')) !== FALSE) {
        $bootstrappers[$key] = 'YourNamespaceCustomLoadConfiguration';
    }

    return $bootstrappers;
}