.background-autoplay {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    top: 0;
    left: 0;
}

.background-autoplay iframe {
    width: 100vw;
    min-height: 100vh;
    height: 56.25vw;
    min-width: 177.77vh;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}