if( ! function_exists( 'videotube_redirect_to_user_channel' ) ){
    function videotube_redirect_to_user_channel() {

        $the_channel_page_id    =   ''; // the page ID goes here.

        if( is_user_logged_in() && is_page( $the_channel_page_id ) ){
            wp_redirect( esc_url( get_author_posts_url( get_current_user_id() ) ) );
            exit;
        }
    }
    add_action( 'wp' , 'videotube_redirect_to_user_channel' );
}