JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width" />
    <link
          rel="stylesheet"
          href="https://cdn.jsdelivr.net/npm/@fancyapps/ui@5.0/dist/fancybox/fancybox.css"
          />
    <style>
      .my-iframe .fancybox__content {
        width: 400px;
        height: 300px;
      }
    </style>
  </head>
  <body>
    <div>
      <p>
        <a href="https://fancyapps.com/iframe.html" data-fancybox data-type="iframe">
          Display an iframe with a custom attribute
        </a>
      </p>
    </div>
    <script src="https://cdn.jsdelivr.net/npm/@fancyapps/ui@5.0/dist/fancybox/fancybox.umd.js"></script>
    <script>
      Fancybox.bind("[data-fancybox]", {
        Html : {
          iframeAttr : {
            allow: "encrypted-media *; autoplay; fullscreen"
          }
        }
      }) 
    </script>
  </body>
</html>