RWMB_OEmbed_Field::get_embed PHP Method

    public static function get_embed($url)
    {
        /**
         * Set arguments for getting embeded HTML.
         * Without arguments, default width will be taken from global $content_width, which can break UI in the admin
         *
         * @link https://github.com/rilwis/meta-box/issues/801
         * @see  WP_oEmbed::fetch()
         * @see  WP_Embed::shortcode()
         * @see  wp_embed_defaults()
         */
        $args = array();
        if (is_admin()) {
            $args['width'] = 360;
        }
        // Try oembed first
        $embed = wp_oembed_get($url, $args);
        // If no oembed provides found, try WordPress auto embed
        if (!$embed) {
            $embed = $GLOBALS['wp_embed']->shortcode($args, $url);
        }
        return $embed ? $embed : __('Embed HTML not available.', 'meta-box');
    }