.body {
  background-color: #000;
}

.background-video {
  width: 100%;
  height: 1400px;
  aspect-ratio: auto;
  object-fit: cover;
  object-position: 50% 0%;
  flex-direction: column;
  display: block;
  position: absolute;
  top: 0%;
  bottom: 0%;
  left: 0%;
  right: 0%;
  overflow: hidden;
}

.div-block {
  width: 100%;
  height: 100vh;
  flex-direction: column;
  align-items: center;
  display: block;

}

@media screen and (max-width: 1920px) {
  .background-video {
    height: 1400px;
  }
}

@media screen and (max-width: 1600px) {
  .background-video {
    height: 1000px;
  }
}

@media screen and (max-width: 1280px) {
  .background-video {
    height: 800px;
  }
}

@media screen and (max-width: 991px) {
  .background-video {
    height: 700px;
  }
}

@media screen and (max-width: 767px) {
  .body {
    flex-direction: column;
    align-items: flex-start;
    display: flex;
  }

  .background-video {
    height: 500px;
    object-fit: cover;
    top: 0%;
    bottom: auto;
    left: 0%;
    right: 0%;
    overflow: visible;
  }
}

@media screen and (max-width: 479px) {
  .background-video {
    height: 450px;
    aspect-ratio: 2 / 3;
    flex: none;
  }
}