video {
  position: fixed;
  right: 0;
  bottom: 0;
  min-width: 100%; 
  min-height: 100%;
}
#video:after {
  content: '';
  opacity: 0.75;
  background: #FF9E1B; /* Old browsers */
  background: -moz-linear-gradient(top,black 5%, #407Ec9 70%, #FF9E1B 100%); /* FF3.6-15 */
  background: -webkit-linear-gradient(top,black 5%, #407Ec9 70%,#FF9E1B 100%); /* Chrome10-25,Safari5.1-6 */
  background: linear-gradient(to bottom,black 5%, #407Ec9 70%,#FF9E1B 100%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#4096ee', endColorstr='#39ced6',GradientType=0 ); /* IE6-9 */
  position:fixed;
  left:0;
  top:0;
  right:0;
  bottom: 0;
}