video { 
    position: fixed;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    z-index: -1;
    transform: translateX(-50%) translateY(-50%);
    //background-image: url(//s3-us-west-2.amazonaws.com/s.cdpn.io/68939/wppost.jpg);
    //background-size:cover;
    //background-position: center;
}
.grayscale video { filter: grayscale(1); }
.pattern {
    position:absolute;
    content:'';
    top:0;bottom:0;left:0;right:0;
    /*$color: #000;
    $rotation: 45/2;*/    
    background-color: transparent;
	background-image: url("data:image/svg+xml,%3Csvg width='6' height='6' viewBox='0 0 6 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23000000' fill-opacity='0.4' fill-rule='evenodd'%3E%3Cpath d='M5 0h1L0 6V5zM6 5v1H5z'/%3E%3C/g%3E%3C/svg%3E");
    background-size: 4px 4px;
}