html, body {
    height: 100%;
}

/* CSS only for examples not required for centering */
.container {
    height: 100%;
}
#myVideo {
  position: fixed;
  right: 0;
  bottom: 0;
  min-width: 100%;
  min-height: 100%;
  z-index: -20;
  filter: contrast(3.0);

}