Incorrect page view on mobile device

Just a word of caution about so-called splash or intro pages. They are the kiss of death for search engine ranking.

Your domain's landing page is the single most important page on your website. It's the first impression that people see on web searches. In the absence of real content to index, SERPs will display nothing about you or what you offer. That's a wasted opportunity.

A well-crafted landing page contains plenty of keyword-rich content that tells people who you are, what you do, and why you are important. Content should generate interest & site traffic.  'Click here to enter' links have no value to you or your site visitors.

This screenshot shows what you're competing with on Google.  It's an impressive first look on the SERP with content gathered from the site's Home page. 

Something to think about...

Good luck with your project.

"Autoplay" is ignored by most mobile devices and many desktop browsers because it's invasive and consumes excessive bandwidth.  There's not much you can do about end-user devices and browser settings. 

As an alternative, replace video with an animated WebP or Gif to use as your background-image.

https://ezgif.com/webp-maker

As for the logo, remove the CSS marked in red.

#ODMLogo {
margin-left: 35%;
position: relative;
z-index: 50;
margin-top: 27%;
text-align: center;
text-shadow: 9px 9px;
float: none;

Hope that helps.