I figured it out
<?php
$args = array(
'post_type' => array('post', 'music-videos'),
'posts_per_page' => 5,
'orderby' => 'menu_order post_date',
);
$loop = new WP_Query( $args );
?>
<div id="example1" class="slider-pro">
<div class="sp-slides">
<div class="sp-thumbnails" >
<?php while ( $loop->have_posts() ) : $loop->the_post(); ?>
<div class="sp-slide">
<div class="sp-image">
<a href="https://wordpress.stackexchange.com/questions/181352/<?php the_permalink() ?>" title="<?php the_title_attribute(); ?>">
<?php the_post_thumbnail( 'related-thumb' ); //the_post_thumbnail( 'col-4-img-thumb' ); ?>
</a>
</div>
<div class="sp-layer sp-black sp-padding"
data-position="bottom"
data-show-transition="up" data-hide-transition="down">
<span class="hide-small-screen" style="font-size:1.75em;"><?php the_title(); ?></span>
</div>
</div>
<div class="sp-thumbnail">
<div class="sp-thumbnail-title"><?php the_title(); ?>
</div>
</div>
<?php endwhile; ?>
<?php wp_reset_postdata(); ?>
</div>
</div>
</div>