* {
    box-sizing: border-box;
  }

  body {
    margin: 0;
    font-family: Arial;
    font-size: 17px;
    background-color: black;
  }

  #myVideo {
    position: fixed;
    right: 0;
    bottom: 0;
    min-width: 100%;
    min-height: 100%;
  }