#myVideo {
  position: fixed;
  top: 0;
  right: 0;
  min-height: 100%;
  min-width: 100%;
  z-index: -10;
}
#container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 90vh;
  align-items: center;
}
#btn {
  padding: 10px 50px;
  border-radius: 5px;
  border: 3px #5f5a5f double;
  background-color: darkblue;
  color: aliceblue;
}
#btn:active {
  background-color: #5f5a5f;
}
#par {
  padding: 10px 50px;
  border-radius: 5px;
  border: 3px #5f5a5f double;
  background-color: darkblue;
  color: aliceblue;
  display: none;
}