CSS skeleton loading screen animation

<div class="video"></div>

.video:empty {
  width: 315px;
  height: 250px; 
  cursor: progress; 
  background: 
    linear-gradient(0.25turn, transparent, #fff, transparent),
    linear-gradient(#eee, #eee),
    radial-gradient(38px circle at 19px 19px, #eee 50%, transparent 51%),
    linear-gradient(#eee, #eee);  
  background-repeat: no-repeat;
  background-size: 315px 250px, 315px 180px, 100px 100px, 225px 30px; 
  background-position: -315px 0, 0 0, 0px 190px, 50px 195px; 
  animation: loading 1.5s infinite;
}

@keyframes loading {  
  to {
    background-position: 315px 0, 0 0, 0 190px, 50px 195px;
  }
}