.video-bg {
  position: relative;
  overflow: hidden;
}
.video-bg video {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  left: 0;
  height: auto;
  width: auto;
  max-height: 1000%;
  max-width: 1000%;
  min-height: 100%;
  min-width: 100%;
  z-index: -9999;
}
.video-bg #particles-js {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: url("");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: 50% 50%;
}