html { 
  margin:0;
  padding:0;
  background: url(../pics/stars/fond/fond.jpg) no-repeat center fixed; 
  -webkit-background-size: cover;
  background-size: cover;
}






video#fdvid {
  position: fixed; left: 0; top: 0;
  min-width: 100%; min-height: 100%;
  width: auto; height: auto; z-index: -100;
 background: url(../pics/stars/fond/fond.jpg) no-repeat;
  background-size: cover;
}

@media (min-aspect-ratio: 16/9) {
    #fdvid {
        width:100%;
        height: auto;
    }
}
@media (max-aspect-ratio: 16/9) {
    #fdvid { 
        width:auto;
        height: 100%;
    }
}
@media (max-width: 767px) {
    #fdvid {
        display: none;
    }
    body {
        background: url('../pics/stars/fond/fond.jpg');
        background-size: cover;
    }
}