Something

function video_cck_flowplayer_settings() {
  $form['flowplayer']['playersettings'] = array(
    '#type' => 'fieldset',
    '#title' => t('FlowPlayer Settings'),
    '#description' => t(' Find out more information about these settings !here', array('!here' => l('here', VIDEO_CCK_FLOWPLAYER_SETTINGS_INFO, array('target' => '_blank')))),
    '#collapsible' => true,
    '#collapsed' => false,
  );
  $form['flowplayer']['playersettings']['video_cck_flowplayer_autoplay'] = array(
    '#type' => 'Checkbox',
    '#title' => t('Autoplay'),
    '#default_value' => variable_get('video_cck_flowplayer_autoplay', true),
    '#description' => t('Autoplay the video on load'),
  );
  $form['flowplayer']['playersettings']['video_cck_flowplayer_loop'] = array(
    '#type' => 'Checkbox',
    '#title' => t('Loop'),
    '#default_value' => variable_get('video_cck_flowplayer_loop', true),
    '#description' => t('Loop the video'),
  );
  return $form;
}