if( ! function_exists( 'videotube_instagram_aspect_ratio' ) ){
    /**
     * @param unknown_type $aspect_ratio
     * @return unknown|string
     */
    function videotube_instagram_aspect_ratio( $aspect_ratio ) {
        $url = $host = '';
        // Get the object from post meta.
        $object = get_post_meta( get_the_ID(), 'video_url', true );

        if( empty( $object ) ){
            return $aspect_ratio;
        }

        $url = parse_url( $object );

        if( isset( $url['host'] ) && ! empty( $url['host'] ) ){
            $host = preg_replace('/^www\./', '', $url['host'] );
        }

        if( isset( $host ) && ! empty( $host ) ){
            if( in_array( $host , array( 'instagram.com', 'twitter.com' ) ) ){
                $aspect_ratio = 'embed-responsive-' . esc_attr( $host );
            }
        }

        if ( preg_match('/twitter.com/', $object ) ){
            $aspect_ratio = 'embed-responsive-twitter';
        }

        return $aspect_ratio;
    }
    add_filter( 'aspect_ratio' , 'videotube_instagram_aspect_ratio', 100, 1 );
}