.daVideo {
    position: fixed;
    left: 0;
    bottom: 0;
    height: 100%;
    width: 100%;
}
.confirm {
    position: fixed;
    left: 0;
    bottom: 0;
    height: 100%;
    width: 100%;
    background-color: white;
}
h1 {
    margin: auto;
    margin-top: 20%;
    text-align: center;
    font-size: 50px;
}