in tax_query this Is the code correct? I need to access beginner video posts for different subject

try this..

$args = array(
            'post_type'         => 'videolesson',
            'ordeby'            => 'rand',
            'order'             => 'DESC',
            'posts_per_page'    => 8,
                'tax_query' => array(
                    'relation' => 'AND',
                    array(
                        'taxonomy' => 'level',
                        'field' => 'slug',
                        'terms' => 'beginner',
                        'compare' => 'IN',

                    ),
                    array(
                       'taxonomy' => 'subjects',
                       'operator' => 'EXISTS'
                    )

                ),
        );
        $getting = new WP_Query( $args );