div.video {
  background-color: lightgrey;
  padding: 10px;
}

div.center {
  text-align: center;
  border: 3px solid white;
  background-color:DodgerBlue;
}

  hf1 {
  color:White;
  }
  

div.videoold {

}


@media screen and (min-width: 1001px) {
  div.video {
     width :70%;
      margin: 0 auto;

  }
  hf1 {
  font-size: 20px;
}
}

@media screen and (max-width: 1000px) {
  div.video {

  }
  hf1 {
  font-size: 40px;
}
}

@media screen and (min-width: 1001px) {
  div.videoold {
     width :40%;
      margin: 0 auto;

  }
}

@media screen and (max-width: 1000px) {
  div.videoold {
     width :60%;
      margin: 0 auto;
  }
}