How to save a media type for the media module, will save new or update

gistfile1.php

<?php

  $types['video'] = new stdClass();
  $types['video']->name = 'video';
  $types['video']->label = "Video";
  $types['video']->base = TRUE;
  $types['video']->type_callback_args = array(
    'match_type' => 'all',
    'mimetypes' => array('/^video/'),
    'extensions' => array('mov', 'mp4', 'avi'),
    'streams' => array('public', 'private'),
  );

  foreach ($types as $name => $type) {
    media_type_save($type);
  }