header {
  height:100vh;
}
img {
  position: absolute;
  top:50%;
  left:50%;
  transform:translate(-50%,-50%);
  /* padding:100%;
  background-color:rgba(0,0,0,0.5); */
}
video {
  object-fit: cover;
  width:100%;
  height:100%;
  display: block;
}
header::before {
  content:'';
  position: absolute;
  top:0;
  left:0;
  width:100%;
  height: 100%;
  background:linear-gradient(142deg, rgba(249,255,0,1) 0%, rgba(0,224,242,1) 100%);
  opacity:0.5;
}

















































/* header {
  height: 100vh;
  overflow: hidden;
}
video {
  object-fit:cover;
}
img {
  position: absolute;
  top:50%;
  left:50%;
  transform:translate(-50%,-50%);
}
header::before {
  content:'';
  background:rgba(0,0,0,0.75);
  width: 100%;
  height: 100%;
  position: absolute;
  top:0;
  left:0;
} */