body {
    margin: 0;
    padding: 0;
}

.container {
    margin: 0 auto;
    max-width: 1200px;
    padding: 10px;
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    aspect-ratio: 16 / 9;
    margin: 1em 0;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

@supports not (aspect-ratio: 16 / 9) {
    .video-container {
        position: relative;
        padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
        height: 0;
        overflow: hidden;
    }
}