html, body {
    margin: 0; padding: 0;min-height: 100%;
}

video {
    position: fixed;
    right: 0;
    bottom: 0;
    min-width: 100%;
    min-height: 100%;
}

main {
    position: fixed;
    display: inline-flex;
    align-items: center;
    min-height: 100vh;
    width: 100%;
}

h1 {
    margin: 0; padding: 0; display: block; width: 235px; height: 131px; background: url(logo.png); background-size: cover; text-indent: -999em;overflow: hidden;
}

.cont {
    margin: 0 auto;
}