CSS-Media-Queries/responsive-iframe.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Responsive Iframe</title>
    <style>
      body {
        display: grid;
        place-items: center;
      }
      .container {
        position: relative;
        width: 100%;
        overflow: hidden;
      }
      .ar-16x9 {
        padding-top: 56.25%; /* 16:9 Aspect Ratio (divide 9 by 16 = 0.5625) */
        /* padding-top: 66.66%;  3:2 Aspect Ratio */
        /*padding-top: 75%;  4:3 Aspect Ratio */
      }
      .container iframe {
        position: absolute;
        top: 0;
        left: 0;
        bottom: 0;
        right: 0;
        width: 100%;
        height: 100%;
      }
    </style>
  </head>
  <body>
    <h1>5 Projects Every Programmer Should Try</h1>
    <div class="container ar-16x9">
      <iframe
        width="560"
        height="315"
        src="https://www.youtube.com/embed/jOFco1xuIeo"
        frameborder="0"
        allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
        allowfullscreen
      ></iframe>
    </div>
  </body>
</html>