body {
  padding: 50px;
  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
}

a {
  color: #00B7FF;
}

video{
  max-width: calc(100vw - 2em);
  max-height: calc(100vh - 5em);
  margin: auto;
  padding-bottom: 1em;
}