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

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

@media (min-aspect-ratio: 16/9) {
    .video-iframe-vimeo iframe {
        height: 56.25vw;
    }
}

@media (max-aspect-ratio: 16/9) {
    .video-iframe-vimeo iframe {
        width: 177.78vh;
    }
}