/**
  * Create a PresentationVideo object for a presentation from a VideoPresentation
  * @param  Presentation $p
  * @param  VideoPresentation $v
  * @return PresentationVideo
  */
 private function createLegacyVideoMaterial(Presentation $p, VideoPresentation $v)
 {
     return PresentationVideo::create(['PresentationID' => $p->ID, 'Name' => $v->Name, 'DisplayOnSite' => $v->DisplayOnSite, 'YouTubeID' => trim($v->YouTubeID), 'Featured' => $v->Featured, 'Created' => $v->LastEdited, 'LastEdited' => $v->LastEdited, 'DateUploaded' => $p->StartDate ?: $p->Summit()->SummitBeginDate]);
 }