body {
  font-family: Arial;
  max-width: 700px;
  margin: auto;
  padding: 20px;
}

input[type="file"] {
  margin-bottom: 20px;
}

button {
  padding: 10px 20px;
  font-size: 16px;
}

video {
  width: 100%;
  margin-top: 20px;
}