if( ! function_exists( 'marstheme_redirect_nonemember_to' ) ){
    /**
     * Redirect the none-member to another page if they visit the video post.
     */
    function marstheme_redirect_nonemember_to() {

        $redirect_to = ''; // The destination link or page id goes here, example: http://example.com, or 123.

        if( absint( $redirect_to ) ){
            $redirect_to = get_permalink( $redirect_to );
        }

        if( is_singular( 'video' ) && !is_user_logged_in() ){
            wp_redirect( esc_url( $redirect_to ) ); exit;
        }
    }
    add_action( 'wp' , 'marstheme_redirect_nonemember_to');
}