How to find scroll top value for div

I am working on responsive site. We need when a user see video section that's need to autoplay. If set scroll top for video tag is not working. But i set scrolltop to window it's working fine.

<video id="test">
</video>

<script>
$(document).ready(function () {
   $(window).scroll(function () {
      var js=$('#test-28').scrollTop();
        console.log(js);
      });
   });
</script>

Its always show 0

Anyone know how to slove this