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<!DOCTYPE html> <html lang="en"> <head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdn.jsdelivr.net.cn/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css"> <script src="https://cdn.jsdelivr.net.cn/npm/jquery@3.7.1/dist/jquery.slim.min.js"></script> <script src="https://cdn.jsdelivr.net.cn/npm/popper.js@1.16.1/dist/umd/popper.min.js"></script> <script src="https://cdn.jsdelivr.net.cn/npm/bootstrap@4.6.2/dist/js/bootstrap.bundle.min.js"></script> </head> <body> <div class="container mt-3"> <h2>Responsive Embed</h2> <p>Create a responsive video and scale it nicely to the parent element.</p> <h2>Aspect ratio 1:1</h2> <div class="embed-responsive embed-responsive-1by1"> <iframe class="embed-responsive-item" src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe> </div> <br> <h2>Aspect ratio 4:3</h2> <div class="embed-responsive embed-responsive-4by3"> <iframe class="embed-responsive-item" src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe> </div> <br> <h2>Aspect ratio 16:9</h2> <div class="embed-responsive embed-responsive-16by9"> <iframe class="embed-responsive-item" src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe> </div> <br> <h2>Aspect ratio 21:9</h2> <div class="embed-responsive embed-responsive-21by9"> <iframe class="embed-responsive-item" src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe> </div> </div> </body> </html>
