body {
  font-family: sans-serif;
  background-color: #f0f0f0;
  color: #333;
  margin: 2em;
}

h1 {
  text-align: center;
  margin-bottom: 1em;
}

video {
  display: block;
  margin: 0 auto;
  width: 100%;
  max-width: 1550px;
  background-color: #000;
}