public function getVideoThumbnailSavePath()
{
// group the thumbnails because of limitations of some filesystems (eg. ext3 allows only 32k subfolders)
$group = floor($this->getId() / 10000) * 10000;
$path = PIMCORE_TEMPORARY_DIRECTORY . "/video-thumbnails/" . $group . "/" . $this->getId();
return $path;
}