@media only screen and (max-width:319px)  {
  .videos {
    width:200px;
    height:150px;	
  }
}


@media only screen and (min-width:320px) and (max-width:767px)  {
  .videos {
    width:300px;
    height:225px;	
  }
}

@media only screen and (min-width:768px) and (max-width:959px)  {
  .videos {
    width:600px;
    height:450px;	
  }
}

@media only screen and (min-width:960px) {
  .videos {
    width:800px;
    height:600px;	
  }
}