body {
  margin: 0;
  padding: 0;
}
.bg-video-wrap {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 100vh;
  background: url(https://designsupply-web.com/samplecontent/vender/codepen/20181014.png) no-repeat center center/cover;
}
video {
  min-width: 100%;
  min-height: 100vh;
  z-index: 1;
}
.overlay {
  width: 100%;
  height: 100vh;
  position: absolute;
  top: 0;
  left: 0;
  background-size: 3px 3px;
  z-index: 2;
}
h1 {
  text-align: center;
  color: #fff;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  z-index: 3;
  
  width: 100%;
  height: 80%;
}