You can just switch the code to something like:
<?php $genres = get_the_terms( $post->ID, 'genres' );
if( $genres ): ?>
<h2>Genres</h2>
<ul>
<?php foreach( $genres as $genre ): ?>
<li><?php echo $genre->name; ?></li>
<?php endforeach; ?>
</ul>
<?php endif; ?>
That will then output any genres associated to that film/post
