html,
body {
  margin: 0 auto;
  height: 100%;
  background-color: rgb(37, 33, 33);
}

h1 {
  text-align:center;
  color: #ffffff; text-decoration: none;
  display: block;
}

video {
    width: 150px;
    margin:0 auto;
    display: block;
}

img {
  width: 150px;
  margin:0 auto;
  display: block;
}

ul {
  list-style: none;
  margin:0 auto;
  display: flex;
  justify-content: none;
}