body {
  margin: 0;
}
#c {
  position: absolute;
  top: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: -20;
}

.container {
  display: block;
  position: absolute;
  top: 5px;
  left: 5px;
}

video {
  display: none;
}