How to display a video on a page that is written in code?

Question

PHP

After the transformations on the site omiclinic.ru , the video on the main page was no longer displayed.
It is written in the code, uploaded on the hosting.
What and where to correct?
so it is written in the Page Template "Homepage" (homepage.php

<div class="video_blok">
  <video src="business.mp4" controls></video>
</div>

so it is written in Theme Header (header.php

<!--SLIDERS RIGHT-->
<div class="home_page_slader">
  <!-- Slader (+) -->
<?php $slider = new WP_Query(array('post_type' => 'slides', 'order' => 'ASC')) ?>
<?php if ( $slider->have_posts() ) : ?>
    <div class="page_slader">
          <div class="owl-carousel">
          <?php while ( $slider->have_posts() ) : $slider->the_post(); ?>
  <div class="item_slader"><a href="<?php the_field( 'ссылка' ); ?>"><?php the_post_thumbnail('full'); ?></a></div>
  <?php endwhile; ?>
</div>               
   </div>
<?php else: ?>
  <div><h3>Место для слайдера</h3></div>
<?php endif; ?>
<!-- Slader (-) -->
</div>	
<div class="slid">
<!--SLIDERS END-->

Answer 1

that is, this is a question for those hosting support?

Answer 2

Video not uploaded / uploaded in the wrong place / something wrong in htaccess
At omiclinic.ru/business.mp4 404 error