body {
    margin: 0;
    overflow: hidden;
}
#videoPlayer {
    width: 100vw;
    height: 100vh;
}
#numDisplay {
    position: absolute;
    visibility: hidden;
    top: 3vh;
    right: 5vw;
    font-size: 24px;
    font-weight: bold;
    opacity: 0.1;
}