@media (min-width: 576px) {
  .video video{
    height: 100%;
    width: 100%;
    /* margin-top: -3px; */
    opacity: 50% black;
    background-color: black;
  }
  #welcome{
    padding: 30px 21px;
    margin-left: 13px;
    margin-right: 20px;
  }
}