JSFiddle - React, Tailwind, and code Playground

HTML

<div class='embed-container'>
  <iframe src='https://player.vimeo.com/video/208791851?autoplay=1&loop=1&background=1' frameborder='0' webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>
</div>

CSS

.embed-container {
		  position: relative;
		  padding-bottom: 56.25%;
		  height: 0;
		  overflow: hidden;
		  max-width: 100%;
		  height: auto;
		}
		
		.embed-container iframe,
		.embed-container object,
		.embed-container embed {
		  position: absolute;
		  top: 0;
		  left: 0;
		  width: 100%;
		  height: 100%;
		}