Order Posts By Youtube Views

https://codex.wordpress.org/Class_Reference/WP_Query#Order_.26_Orderby_Parameters

<ul>
<?php 
$item=0;  

$attr = array( 
  'post_type' => 'lyrics', 
  'date_query' => array( array( 'after' => '1 month ago' ) ), 
  'post_status'=> 'publish', 
  'meta_key'       => 'youtube_views', 
  'orderby'        => 'meta_value',
  'order'          => 'DESC',
  'posts_per_page' => 10 
);

$loop = new WP_Query( $attr );
while ( $loop->have_posts() ) : $loop->the_post();
  $song_name = get_the_title();

    /*YOUTUBE QUERY HERE*/
//    $Yviews = 1234;

    ?>
    <li>
    <?php echo esc_attr($song_name).' ('.$Yviews.' views)'; ?>
    </li>
  <?php endwhile; wp_reset_query(); ?>
</ul>