/* This is a single-line comment */
* {
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    font-family: Arial;
    font-size: 17px;
    background: rgb(0, 0, 0);
  }
  
  #myVideo {
    position: fixed;
    margin-top: -25%;
    margin-left: -25%;
    width: 150%; 
    height: 150%;
  }
  
  .content {
    position: fixed;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    color: #f1f1f1;
    width: 100%;
    padding: 20px;
  }
  
  #myBtn {
    width: 200px;
    font-size: 18px;
    padding: 10px;
    border: none;
    background: #000;
    color: #fff;
    cursor: pointer;
  }
  
  #myBtn:hover {
    background: #ddd;
    color: black;
  }