#video {
  z-index: -1;
  width: 100%;
  height: 100%;
  position: absolute;
  pointer-events: all;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
	-webkit-transform: translate(-50%, -50%);
 
}

.testA {
	width: 100px;
	height: 100px;
	background-color:#C06;
	position:absolute;
}