video-background {
  video[data-desktop="true"] {
    display: none;
  }

  video[data-mobile="true"] {
    display: initial;
  }
}

@media (min-width: 750px) {
  video-background {
    video[data-desktop="true"] {
      display: initial;
    }

    video[data-mobile="true"] {
      display: none;
    }
  }
}