.background-video {
  position: absolute;
  inset: 0;
  display: block;
  overflow: hidden;
}

.background-video__poster {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
  transition: opacity 400ms ease;
}

.background-video__poster-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.background-video__poster--hidden {
  opacity: 0;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .background-video__poster {
    transition: none;
  }
}