.overlay-video {
  display: none;
  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
  opacity: 0;
  transition: opacity 600ms ease-in;
  transition: opacity 0.6s;
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 999999;
}

.o1 {
  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
  opacity: 1;
  transition: opacity 600ms ease-out;
  transition: opacity 0.6s;
}

.videoWrapperExt {
  position: relative;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 982px;
  padding: 0 20px;
z-index: 999999;
}

.videoWrapper {
  position: relative;
  padding-bottom: 56.25%;
  /* 16:9 */
  height: 0;
z-index: 999999;
}

.videoWrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
z-index: 999999;
}

.close {
  background-image: url(http://djit.ac/assets/images/news/mark.png);
  position: absolute;
  top: -50px;
  right: 0px;
  cursor: pointer;
  z-index: 9999;
  height: 40px;
  width: 40px;
  background-size: 40px;
z-index: 999999;
}
@media (max-width: 767px) and (orientation: landscape) {
  .close {
    display: none;
  }
}

/* demo purpose */
.start {
  text-align: center;
  font-size: 30px;
  text-decoration: none;
  color: yellow;
  text-transform: uppercase;
  cursor: pointer;
z-index: 999999;
}