body {
  margin: 0;
  background: #FFFFFF;
  overflow:hidden;
}
video { 
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 1920px;
    min-height: auto;
    width: 100%;
    height: auto;
    z-index: -100;
    transform: translateX(-50%) translateY(-50%);
    background-size: cover;
    overflow: hidden;    
}