if( ! function_exists( 'videtube_filter_related_widget_args' ) ){
    /**
     *
     * Filter the related videos widget
     *
     * @param array $args
     * @param string $widget_id
     *
     */
    function videtube_filter_related_widget_args( $args, $widget_id = '' ) {
        global $post;

        if( ! is_singular( 'video' ) ){
            return $args;
        }

        if( false !== $related_posts = get_transient( 'related_posts_' . $post->ID ) ){
            $args['post__in'] = $related_posts;
        }
        else{
            $maybe_posts = new WP_Query( $args );
            if( $maybe_posts->have_posts() ){
                $args['post__in'] = wp_list_pluck( $maybe_posts->posts, 'ID' );
            }
            wp_reset_postdata();
            wp_reset_query();
            if( isset( $args['post__in'] ) && is_array( $args['post__in'] ) ){
                set_transient( 'related_posts_' . $post->ID, $args['post__in'] );
            }
        }
        return $args;
    }
    add_filter( 'mars_related_widget_args' , 'videtube_filter_related_widget_args', 100, 2 );
}