Hello,

I found this solution works for me, problem on button click i have to set dynamic url on 2 places

Please advice

<link runat="server" id="vdref" rel="preload" as="video" href="dynamic video url on button clikc">
<video id="video" runat="server" width="100%" height="240" class="wrapped-iframe" controls></video>
<script>
  // Later on, after some condition has been met, set video source to the
  // preloaded video URL.
  video.src = 'dynamic url on button clik';
  video.play().then(_ => {
    // If preloaded video URL was already cached, playback started immediately.
  });
</script>

Refer below link.

Play all videos from Folder in HTML5 video player using JavaScript, C# and VB.Net