JSFiddle - React, Tailwind, and code Playground

HTML

<div class="video-size">
  <video  autoplay loop controls muted>
    <source src="http://techslides.com/demos/sample-videos/small.mp4" type="video/mp4">
  </video>
</div>

CSS

.video-size {
    height:200px; /* Height option*/
    width:100%;
	overflow:hidden;
}
.video-size > video {
    min-width: 100%;
    min-height: 100%;
}