.video video{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

@media screen and (min-width:769px) {
    .video video {
        min-height:45rem;
    }
}
@media screen and (max-width:768px) {
    .video video {
        min-height:26rem;
    }
}