.center-div
  {
    position: sticky;;
    margin: auto;
    top: 5%;
    right: 0;
    bottom: 0;
    left: 0;
    max-height: 720px;
    aspect-ratio: 16 / 9;
    background-color: #11103a;
    border-radius: 3px;
  }

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

  #player {
    background-color: #11103a;
  }