How to display images/videos on the main page post entry's ?

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Hey, I’m currently editing a new theme I have installed called ‘CleanMag’ and I have run into some issues that I would really need some help with.

The main page post entry’s doesn’t show videos/or pictures (only the featured image), what I need to know is how to change it so you can view images/videos/media on the main page without clicking the individual post.

I have done some searching all night but can’t find the correct solution.

the index.php looks like this :

<?php
/**
 * @package WordPress
 * @subpackage CleanMag Theme
 */
$options = get_option( 'cleanmag_theme_settings' );
?>
<?php get_header(' '); ?>
<?php the_content();?>
<div class="grid_17 alpha">
<?php
//start main loop here
if (have_posts()) : ?>
<?php get_template_part( 'post' , 'entry') ?>
<?php endif; ?>

<?php
// include pagination
if (function_exists("pagination")) { pagination($additional_loop->max_num_pages); } ?>

</div>
<!-- END grid_17 -->
<?php get_sidebar(' '); ?>
<?php get_footer(' '); ?>