Pimcore\Model\Document\Tag\Video::getImageThumbnail PHP Метод

    public function getImageThumbnail($config)
    {
        if ($this->poster && ($poster = Asset::getById($this->poster))) {
            return $poster->getThumbnail($config);
        }
        if ($this->getVideoAsset()) {
            return $this->getVideoAsset()->getImageThumbnail($config);
        }
        return "";
    }