app.css

html,
body {
  margin: 0;
  padding: 0;
}

html {
  height: 100%;
}

body {
  font-family: Helvetica, Arial, sans-serif;
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

header {
  background: #f0293e;
  color: #fff;
  text-align: center;
}
main {
  background: #ffffff;
  min-height: 80vh;
  flex-grow: 1;
}

.controls {
  text-align: center;
  padding: 0.5em 0;
  background: #333e5a;
}

.controls {
  color: #fff;
}
.controls p {
  margin: 0;
}
.controls > div {
  margin-bottom: 0.5em;
}
.controls > div:last-child {
  margin-bottom: 0;
}

video {
  width: 100%;
  max-width: 600px;
  display: block;
  margin: 0 auto;
}

footer {
  background: #333e5a;
  color: #fff;
  text-align: center;
}

footer a {
  color: #fff;
}