.section {
  background-color: #000;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
  display: flex;
}

.div-block {
  color: #fff;
  font-family: Montserrat, sans-serif;
}

.heading {
  font-size: 200px;
  line-height: 200px;
}

.background-video {
  width: 100%;
  height: 100%;
}

.div-block-2 {
  z-index: 2;
  width: 1920px;
  height: 1080px;
  position: relative;
}

@media screen and (max-width: 991px) {
  .div-block-2 {
    width: 800px;
    height: 600px;
  }
}

@media screen and (max-width: 767px) {
  .heading {
    font-size: 100px;
    line-height: 100px;
  }
}

@media screen and (max-width: 479px) {
  .heading {
    font-size: 70px;
    line-height: 70px;
  }

  .div-block-2 {
    width: 400px;
    height: 300px;
  }
}