.video-container {
  height: 80vh;
  position: relative;
  overflow: hidden;
}
@media (min-width: 600px) {
  .video-container {
    height: 100vh;
  }
}
 
video {
  -o-object-fit: cover;
     object-fit: cover;
  position: absolute;
  height: 100%;
  width: 100%;max-width:100%;
  top: 0;
  left: 0;
}