public static function html($meta, $field)
{
return parent::html($meta, $field) . sprintf('<a href="#" class="rwmb-embed-show button">%s</a>
<span class="spinner"></span>
<div class="rwmb-embed-media">%s</div>', esc_html__('Preview', 'meta-box'), $meta ? self::get_embed($meta) : '');
}