.buffered {
    height: 20px;
    position: relative;
    background: #555;
    width: 300px;
  }

  #buffered-amount {
    display: block;
    height: 100%;
    background-color: #777;
    width: 0;
  }

  .progress {
    margin-top: -20px;
    height: 20px;
    position: relative;
    width: 300px;
  }

  #progress-amount {
    display: block;
    height: 100%;
    background-color: #595;
    width: 0;
  }