body, html {
    margin: 0;
    padding: 0;
    height: 100%;
}
.video-background {
    z-index: -100;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}
.video-background video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
}