html,
body,
* {
  padding: 0;
  margin: 0;
}
html,
body {
  height: 100%;
  overflow: hidden;
}
video {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  outline: none;
}
.center-element {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}