Service Portal widget code to add video in Service Portal ServiceNow

HTML

<h1>CSS/Javascript popup with Lightbox effect</h1>
 <div id="light">
  <a class="boxclose" id="boxclose" onclick="lightbox_close();"></a>
  <video id="VisaChipCardVideo" width="600" controls>
      <source src="https://www.w3schools.com/html/mov_bbb.mp4" type="video/mp4">
      <!--Browser does not support <video> tag -->
    </video>
</div>
 <div id="fade" onClick="lightbox_close();"></div>
 <div>
  <a href="javascript:void(0)" onclick="lightbox_open();">Watch video</a>
</div>
 <div class="test">test</div>
<div class="test2">test2</div>
<script>
  window.document.onkeydown = function(e) {
  if (!e) {
    e = event;
  }
  if (e.keyCode == 27) {
    lightbox_close();
  }
}
 function lightbox_open() {
  var lightBoxVideo = document.getElementById("VisaChipCardVideo");
  window.scrollTo(0, 0);
  document.getElementById('light').style.display = 'block';
  document.getElementById('fade').style.display = 'block';
  lightBoxVideo.play();
}
 function lightbox_close() {
  var lightBoxVideo = document.getElementById("VisaChipCardVideo");
  document.getElementById('light').style.display = 'none';
  document.getElementById('fade').style.display = 'none';
  lightBoxVideo.pause();
}
  </script>

CSS

#fade {
  display: none;
  position: fixed;
  top: 0%;
  left: 0%;
  width: 100%;
  height: 100%;
  background-color: black;
  z-index: 1001;
  -moz-opacity: 0.8;
  opacity: .80;
  filter: alpha(opacity=80);
}
 #light {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  max-width: 600px;
  max-height: 360px;
  margin-left: -300px;
  margin-top: -180px;
  border: 2px solid #FFF;
  background: #FFF;
  z-index: 1002;
  overflow: visible;
}
 #boxclose {
  float: right;
  cursor: pointer;
  color: #fff;
  border: 1px solid #AEAEAE;
  border-radius: 3px;
  background: #222222;
  font-size: 31px;
  font-weight: bold;
  display: inline-block;
  line-height: 0px;
  padding: 11px 3px;
  position: absolute;
  right: 2px;
  top: 2px;
  z-index: 1002;
  opacity: 0.9;
}
 .boxclose:before {
  content: "×";
}
 #fade:hover ~ #boxclose {
  display:none;
}
 .test:hover ~ .test2 {
  display: none;
}

Output: