#fb-video { position: relative; padding-bottom: 56.25%; /* 16:9 aspect ratio */ height: 0; overflow: hidden; } #fb-video-player { position: absolute; top: 0; left: 0; width: 100%; height: 100%; } var videoId = "j-Sq7O2NiB"; var embedUrl = "https://www.facebook.com/plugins/video.php?href=https%3A%2F%2Fwww.facebook.com%2F" + videoId + "%2F&show_text=0&width=560"; document.getElementById("fb-video-player").setAttribute("src", embedUrl);