JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <video class="video" controls autoPlay src="http://upload.wikimedia.org/wikipedia/commons/7/79/Big_Buck_Bunny_small.ogv"></video>
  <canvas class="canvas"></canvas>
</div>

CSS

.container {
  margin: 0 auto;
  position: relative;
}

.video {
  width: 100%;
  height: auto;
  position: absolute;
  top: 0;
  left: 0;
}

.canvas {
  width: 100%;
  height: auto;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
}