JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/remodal/1.0.7/remodal.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/remodal/1.0.7/remodal-default-theme.min.css">
<script src="https://code.jquery.com/jquery-2.2.4.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/remodal/1.0.7/remodal.min.js"></script>
<a href="#modal">Call the modal with data-remodal-id="modal"</a>

<div class="remodal" data-remodal-id="modal" role="dialog" aria-labelledby="modal1Title" aria-describedby="modal1Desc">
  <button data-remodal-action="close" class="remodal-close" aria-label="Close"></button>
  <div class="video-container clearfix">
    <div class="video clearfix">
      <iframe width="500" height="315" src="http://www.youtube.com/embed/i1EG-MKy4so?enablejsapi=1" frameborder="0" allowfullscreen></iframe>
    </div>
  </div>
</div>

JavaScript

function toggleVideo(e, state) {
  var div = $(e.target)[0];
  var iframe = div.getElementsByTagName("iframe")[0].contentWindow;
  div.style.display = state == 'hide' ? 'none' : '';
  func = state == 'hide' ? 'pauseVideo' : 'playVideo';
  iframe.postMessage('{"event":"command","func":"' + func + '","args":""}', '*');
}

$(document).on('opening', '.remodal', function(e) {
  toggleVideo(e);
});

$(document).on('closing', '.remodal', function(e) {
  toggleVideo(e, 'hide');
});