gistfile1.php

<?php

function radius_program_field__field_video_reference__program(&$vars) {
  foreach ($vars['element']['#items'] as $delta => $video){
    $node_id = key($vars['element'][$delta]['node']);
    $vars['element'][$i]['node'][$node_id]['#node']->number = $delta+1;
  }
  return theme_field($vars);
}