ok thanks for your repply
Here is what I’ve done and got it worked without any fixed ID
<?php if( have_rows('dvd_list') ) : ?>
<?php while( have_rows('dvd_list') ): the_row();
$dvdItem = get_sub_field('dvd_object');
if ( $dvdItem) :
$dvdName= get_field_object('dvd_name', $dvdItem->ID);
?>
<div><?php echo $dvdName['value']; ?></div>
<?php endif; ?>
<?php endwhile; ?>
<?php endif; ?>