protected function form($config)
    {
        parent::form($config);
        $type = isset($config['type']) ? $config['type'] : 'video';
        ?>
<p>
<label><input type="radio" name="type" value="video" <?php 
        if ($type == 'video') {
            echo 'checked="checked"';
        }
        ?>
/> vídeo </label>
<label><input type="radio" name="type" value="gallery" <?php 
        if ($type == 'gallery') {
            echo 'checked="checked"';
        }
        ?>
/> galeria </label>
</p>
        <?php 
    }