body {
    background-color: darkseagreen;
}

div.content {
    float: left;
    margin-left: 50%;
    transform: translateX(-50%);
    text-align: center;
}

div.content p {
    font-size: 1.5em;
    font-family: system-ui, sans-serif;
}

div.content video {
    max-width: 90vw;
}