All classes that implement MediaThumbnailInterface in Media Thumbnails 8
- class \Drupal\media_thumbnails\Plugin\MediaThumbnailBase implements ContainerFactoryPluginInterface, MediaThumbnailInterface uses StringTranslationTrait
- class \Drupal\media_thumbnails_svg\Plugin\MediaThumbnail\MediaThumbnailSVG
- class \Drupal\media_thumbnails_video\Plugin\MediaThumbnail\MediaThumbnailVideo