JSFiddle - React, Tailwind, and code Playground

HTML

<div class="single__video">
  <iframe width="560"  src="https://www.youtube.com/embed/PnaXw_qUg3A" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen=""></iframe>
</div>

CSS

.single__video {
  margin-bottom: 76px;
}

iframe {
  display: block;
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: 20px;
}