html body video {
    position: fixed;
    top: 50%;
    left: 50%;
    width: auto;
    height: auto;
    z-index: -100;
    -webkit-transform: translateX(-50%) translateY(-50%);
    transform: translateX(-50%) translateY(-50%);
    background: url(/content/img/mybg.png) #fff;
    background-size: cover;
    -webkit-transition: 1s opacity;
    transition: 1s opacity;
}

#main {
    min-height: auto !important;
    padding: 0 !important;
}