html,body {
  margin: 0;
  height: 100%;
  background: #000;
}
.player {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
}
video, .placeholder {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}
.placeholder svg {
  width: 100%;
  height: 100%;
}