html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    margin: 0;
}

.container {
    width: 100%;
    height: 100%;
    text-align: center;
}
.video {
    width: auto;
    height: 800px;
}
@media screen and (max-width: 959px) {
.video {
    height: 600px;
}
}
@media screen and (max-width: 480px) {
.video {
    height: 500px;
}
}