Embedded video doesn't work "

Hi,

Since I’ve upgraded from WordPress 3.x to 4.x embedded video’s don’t work anymore. In v3 users could submit video’s through a form to their personal page. The page would be displaying their video embedded. The code that I used before:

<section id="VideoContainer">
    		<?php the_post_format_video(); ?>
    </section>

Any idea how to solve this in WordPress 4?

Thanks
Tommy