if( ! function_exists( 'videotube_child_author_loop_before' ) ){

    /**
     * @param html $input
     * @return html
     */

    function videotube_child_author_loop_before( $input ) {

        // Turn on buffering
        ob_start();
        ?>
            <!-- HTML tag goes here -->



        <?php
        $input  =    ob_get_clean() . $input;

        return $input;
    }

    add_filter( 'videotube_author_loop_before' , 'videotube_child_author_loop_before', 20, 1 );
}