body {
    background: #000;
    color: white;
  }

  .center {
    margin: auto;
    width: 50%;
    border: 3px solid green;
    padding: 10px;
    min-height: 700px;
    text-align: center;
  }

  #main {
    width: 100%;
    max-width: 800px;
    margin: 30px auto 20px;
  }
  #main p {
    padding: 20px;
    margin:20px 0;
    background: lightyellow;
  }
  .youtube-player {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    max-width: 100%;
    background: #000;
    margin: 5px;
  }
  
  .youtube-player iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 100;
    background: transparent;
  }
  
  .youtube-player img {
    object-fit: cover;
    display: block;
    left: 0;
    bottom: 0;
    margin: auto;
    max-width: 100%;
    width: 100%;
    position: absolute;
    right: 0;
    top: 0;
    border: none;
    height: auto;
    cursor: pointer;
    -webkit-transition: 0.4s all;
    -moz-transition: 0.4s all;
    transition: 0.4s all;
  }
  
  .youtube-player img:hover {
    -webkit-filter: brightness(75%);
    -moz-filter: brightness(75%);
    filter: brightness(75%);
  }
  
  .youtube-player .play {
    height: 72px;
    width: 72px;
    left: 50%;
    top: 50%;
    margin-left: -36px;
    margin-top: -36px;
    position: absolute;
    background: url("https://i.imgur.com/TxzC70f.png") no-repeat;
    cursor: pointer;
  }