#MovieList {
    width: 640px;
    margin: 0 auto;
}

#MovieList li {
    width: 96%;
    margin: 5% auto;
}

#MovieList li video {
    width: 100%;
    background: #999;
}

@media screen and (max-width: 480px) {
    #MovieList {
        width: 100%;
    }
}