body{
  background-image: url("https://wallpapercave.com/wp/wp1947344.jpg");
}

.carousel{
  z-index: 0;
  width: 100%;
  height: 80vh;
}
.carousel a[role="button"]{
  z-index: 1;
  width: 40px;
}

.carousel-inner{
  width: 100%;
  height: 100%;
}

.carousel-item{
  margin-left: 8%;
  width: 84%;
  height: 100%;
  z-index: 1;
}
.carousel-item iframe{
  width: 100%;
  height: 100%;
  z-index: 2;
}
.carousel-item img{
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
}
.carousel-caption h5 span{
  background-color: #000000dd;
}