body {
  background-color: black;
}

button {
  background-color: transparent;
  border: none;
  display: block;
  height: auto;
  width:  auto;
}

video {
  height: auto;
  width: 100%;
}

.buttons {
  margin-top: 10px;
  position:  absolute;
  z-index: 1;
}