body {
    background-color: #000;
    padding: 0;
    margin: 0;
    height: 100vh;
}

div.outer {
    width: 100vw;
    max-width: 1280px;
    padding: 0;
    height: 100%;
    margin: auto;
    display: table;
}
div.inner {
    display: table-cell;
    vertical-align: middle;
}
video {
    width: 100%;
    padding: 0;
    margin: auto 0;
}