Code to make logo clickable [insert in cover page advanced code injection where href='xxx' is URL to redirect]:

 

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
     <script>
     $(document).ready(function(){
     $( "div[data-compound-type='logo']" ).wrapInner("<a href='http://www.williamcoopermitchell.com/action'></a>");
       });
     </script>

 

To set video as background on Homepage (cover page), insert this code into cover page advanced code injection where url = "video url"

 

<script type="text/javascript">
      $(window).bind("load", function() {
        if( /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent) ) {
        } else {
          var banner = $('.sqs-slice-gallery-item > img');
          banner.hide();
          var url = "http://kenny-foot-ld43.squarespace.com/s/Les-Basics-1080-Vimeo-download-1080-height.mp4";
          $('<video class="bannerVideo" autoplay loop><source src="' + url + '" type="video/mp4"></video>').insertAfter(banner);
          adjustBanner($('.bannerVideo'), banner);
          $(window, banner).resize(function() {
            adjustBanner($('.bannerVideo'), banner);
            setTimeout(function() {
              adjustBanner($('.bannerVideo'), banner);
            }, 200);
          });
        }
        function adjustBanner (video, banner) {
          video.css({
            height: '100vh',
            width: '100vw',
            top: banner.css('top'),
            left: banner.css('left'),
            position: 'relative',
            'object-fit': 'cover'
          });
        }
      });
    </script>

 

Then add this code in Settings > Advanced > Code Injection

<script src="https://code.jquery.com/jquery-2.1.3.min.js"></script>