body{
    margin:0;
    height:100vh;
    display:flex;
    overflow:hidden;
    background:#111;
    align-items:center;
    flex-direction:column;
    justify-content:center;
}
.fullscreen-video{
    height:100%;
    object-fit:cover;
}
.loader{
    top:50%;
    left:50%;
    display:none;
    position:absolute;
    transform:translate(-50%,-50%);
}