.zt_parallax_wrap .video-bg {
  background-size: cover;
  position: relative;
  overflow: hidden;
  z-index: 1;
}
.zt_parallax_wrap .video-bg .vid-overlay {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: -2;
  -webkit-backface-visibility: hidden;
  -webkit-transform: translateZ(0);
}
.zt_parallax_wrap .video-bg iframe {
  position: absolute;
  z-index: -10;
}