.overlay-video {
  display: none;  
  opacity: 0;
  transition: opacity 600ms ease-in;
  transition: opacity 0.9s;
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 999999;
}

.o1 {
 
  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;
}

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

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

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

/* purpose */
.start {width:100%; text-align: center; cursor: pointer;}