What about add else {
after get_template_part( 'template-parts/content', 'video'); }
?
EDIT (1) :
<?php
/**
* The template for displaying single posts.
*
* @package SN
*/
get_header(); ?>
<?php while ( have_posts() ) : the_post(); ?>
<?php if( has_post_format('video')) {
get_template_part( 'template-parts/content', 'video'); }else{ ?>
<div id="content-wrapper">
<div id="primary" class="content-area">
<main id="main" class="site-main" role="main">
<article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
<header class="entry-header">
<div class="entry-content">
<?php the_content(); ?>
<?php if( 'scoreboard' == get_post_type() ) { ?>
<?php } else { ?>
<?php
wp_link_pages( array(
'before' => '<div class="page-links">' . __( 'Pages:', 'sport-news' ),
'after' => '</div>',
) );?>
</div><!-- .entry-content -->
</header>
<?php }
}?>
<footer class="entry-footer">
<?php sport_news_entry_footer(); ?>
</footer><!-- .entry-footer -->