html body {
    width: 100%;
    height: 100vh;
    margin: 0;
    padding: 0;
}

.loop-video {
    display: flex;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 0;
    overflow: hidden;
}

@media screen and (max-width: 767px) {

    html body {
        width: 100%;
        height: 100vh;
        margin: 0;
        padding: 0;
    }

}