.parrafo{
  background-color: orange;
}

.video{
  height: 400px;
  width : 400px;
  border-style: solid;
  border-color: orange;
}

#video_principal{
  border-style: solid;
  border-color: orange;
}

.boton{
  background-color: grey;
  color: orange;
  text-align: center;
  text-decoration: none;
  display: inline-block;
}

body{
  background-color: black
}