._404 {

    z-index: -6;
    left: 0;
    right: 0;
    object-fit: cover;
 
}
._404 video {
    width: 100%;
    object-fit: cover;
}
  .mobile {
        display:none;
    }
      .desktop{
        display:block;
    }
@media (max-width:1100px){
    .desktop{
        display:none;
    }
      .mobile{
        display:block;
    }
}
@media (min-width:1200px) and (min-height:790px){
  ._404 {
    position:fixed;
    z-index: -6;
    left: 0;
    right: 0;
    object-fit: cover;
    height:100vh;
 
}
._404 video {
    object-fit: cover;
    position: absolute;
    left: 0;
    right: 0;
    height: 100%;
}
}