.vidbacking-active-body-back {
  position: fixed;
  z-index: -100;
  min-width: 100%;
  min-height: 100%;
  top: 50%;
  left: 50%;
  background-size: cover;
  overflow: hidden;
  opacity: 1;
  transition: 2s opacity;
  transform: translateX(-50%) translateY(-50%);
}

.vidbacking-active-block-back {
  position: absolute;
  min-width: 100%;
  min-height: 100%;
  height: auto;
  width: auto;
  z-index: -100;
  top: 50%;
  left: 50%;
  transform: translateX(-50%) translateY(-50%);
}

.vidbacking {
  display: none;
}

.vidmask-body-back {
  background: url(videooverlay1.png) repeat;
  opacity: 0.4;
  min-height: 100%;
  min-width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: -50;
  display: block;
}

.vidmask-block-back {
  background: url(videooverlay1.png) repeat;
  opacity: 1;
  min-height: 100%;
  min-width: 100%;
  position: absolute;
  top: 0;
  left: 0;
  height: auto;
  width: auto;
  z-index: -50;
  display: block;
}