public static function initializeDefaultUpdateFeed(KalturaYouTubeDistributionProfile $distributionProfile, $fieldValues, $videoFilePath, $thumbnailFilePath, YouTubeDistributionRemoteIdHandler $remoteIdHandler)
 {
     $identifier = $fieldValues[KalturaYouTubeDistributionField::ASSET_CUSTOM_ID];
     $videoTag = $identifier . '-video';
     $thumbnailTag = $identifier . '-thumbnail';
     $feed = new YouTubeDistributionRightsFeedHelper($distributionProfile);
     $feed->setNotificationEmail($fieldValues);
     if ($remoteIdHandler->getVideoId()) {
         $feed->setByXpath('video/@tag', $videoTag);
         $feed->setVideoMetadataByFieldValues($fieldValues, $remoteIdHandler->getVideoId());
     }
     if ($remoteIdHandler->getAssetId()) {
         $feed->setByXpath('asset/@tag', $videoTag);
         $feed->setAssetMetadataByFieldValues($fieldValues, $remoteIdHandler->getAssetId());
     }
     // thumbnail file
     if (file_exists($thumbnailFilePath)) {
         $feed->appendFileElement('image', false, pathinfo($thumbnailFilePath, PATHINFO_BASENAME), $thumbnailTag);
         $feed->appendVideoArtworkElement('custom_thumbnail', $thumbnailTag);
     }
     $feed->setAdParamsByFieldValues($fieldValues, $videoTag, $distributionProfile->enableAdServer);
     return $feed;
 }