What you can try is create a simple PHP file, something like
test.php
only containing
<?php echo "this is a test...'; ?>
and visit your site
http://onlinevideomarketingworks.com/test.php
just trying to rule out if you have any other file interferring it on your website root. This looks more like a DNS issue, nothing to do with WordPress.
Usually reporting this kind of problem to your hosting support can solve it for you.