JSFiddle - React, Tailwind, and code Playground

HTML

<video width='320' height='240' controls id="myvideo" style="display:none;">
    <source src='http://techslides.com/demos/sample-videos/small.mp4'>
      Your browser does not support the video tag.
  </video>

JavaScript

var video = document.getElementById("myvideo"),
    something = confirm("Want to watch a video?");

if (something) {
  video.style.display = "block";
  video.play();
} else {
  alert("Okay.");
}