body {
  background-color: black;
  color: white;
    text-align: center;
    font-size: 25px;
  }
  
video {
    display: inline-block;
    margin:0;
    padding: 15;    
    border: 2px solid white;
}

  .light-mode {
    padding: 25px;
    background-color: white;
    color: black;
    font-size: 25px;
  }