OEmbedDeriver.php

<?php

namespace Drupal\media\Plugin\media\Source;

use Drupal\Component\Plugin\Derivative\DeriverBase;
use Drupal\Core\StringTranslation\StringTranslationTrait;

/**
 * Derives media source plugin definitions for supported oEmbed providers.
 *
 * @internal
 *   This is an internal part of the oEmbed system and should only be used by
 *   oEmbed-related code in Drupal core.
 */
class OEmbedDeriver extends DeriverBase {
    use StringTranslationTrait;
    
    /**
     * {@inheritdoc}
     */
    public function getDerivativeDefinitions($base_plugin_definition) {
        $this->derivatives = [
            'video' => [
                'id' => 'video',
                'label' => $this->t('Remote video'),
                'description' => $this->t('Use remote video URL for reusable media.'),
                'providers' => [
                    'YouTube',
                    'Vimeo',
                ],
                'default_thumbnail_filename' => 'video.png',
            ] + $base_plugin_definition,
        ];
        return parent::getDerivativeDefinitions($base_plugin_definition);
    }

}