Video plugin won't load video on website

I am currently using a ThemeForest template to build a website, using the template as a basis to learn and experiment. One of the plugins included with the template is VenoBox (http://veno.es/venobox/).

The website is currently live which you can view here: http://timothymaryon.com/

Once on the website, click on the top right image (Scope) to see that the video looks like it's loading, but doesn't actually load or play. I have gone through the documentation on the VenoBox website and can't for the life of me figure out why the video won't play. There doesn't appear to be any console errors or issues with the code. I've tried this with Vimeo and YouTube, and nothing works.

Here is the HTML relating to the VenoBox plugin:

<div class="works-item signature-adler ImageWrapper works-item-one-half zoom logos">
                      <img data-no-retina alt="" title="" class="img-responsive" src="images/works/04.jpg"/>
                      <a  class="venobox" data-gall="portfolio-gallery" data-vbtype="video" data-autoplay="true" href="https://vimeo.com/221800817">
                          <div class="works-item-inner ImageOverlayHe">
                            <p class="valign text-center"><span class="white font3">SCOPE</span></p>
                          </div>
                      </a>
              </div>

And the JS:

<script src="javascripts/libs/common.js"></script>
    <script src="javascripts/libs/bootstrap.min.js"></script>
    <script src="javascripts/custom/main.js"></script>
    <script src="javascripts/custom/lightbox.js"></script>
    <script>
    $(document).ready(function(){
    $('.venobox').venobox(); 
});</script>

I won't paste all of the code as you can inspect it from the website, but I've ensured that everything is in it's right place, as far as I'm aware!

Any help on this would be greatly appreciated as I feel I've made quite a lot of progress but clearly have fallen down somewhere along the line!

Thanks,

Georgie