body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    font-family: Arial, sans-serif;
}

video {
    width: 320px;
    height: 240px;
    border: 1px solid black;
}

button, a {
    margin-top: 10px;
}