How to maintain aspect ration of YouTube videos with CSS

Puneet Sharma

2 years ago

Hey, you can create responsive YouTube videos with the help of CSS only and maintain its aspect ratio without needing any third-party JavaScript library. The easiest and quickest way to do it is with the following CSS.

HTML

<div class="container">
    <iframe width="560" height="315" src="https://www.youtube.com/embed/KN1UPMXocyc" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
  </div>

CSS

.container {
    position: relative;
    width: 100%;
    height: 0;
    padding-top: 56.25% // 9 / 16 * 100%
  }

  .container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }

DEMO

See the Pen Untitled by Puneet Sharma (@webdevpuneet) on CodePen.