<div class="embed-responsive embed-responsive-16by9">
<video autoplay="autoplay" id="myvideo"><source src="path_to_video.mp4" type="video/mp4" /> Browser does not support this format.</video>
</div>
<script type="text/javascript" charset="utf-8">    
  $(document).ready(function() {  
 
    // Hide the "Next" button
    $('#ls-button-submit').hide();
 
    var vid = document.getElementById("myvideo");
 
                // Set a volume if necessary
                vid.volume = 0.3; 
                // When video is watched show the NEXT-button and proceed to the next question
    vid.onended = function() {
      // Show the "Next" button
      $('#ls-button-submit').show().trigger('click');
    }
    });
</script>