.st-video-popup .vc_figure {
    position: relative;
}

.st-video-popup .box {
  position: absolute;
  top: 0;
  right: 0;
  margin: 10px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 2px solid #fff;
  cursor: pointer;
}

.st-video-popup .tri {
    position: relative;
    top: 50%;
    left: 50%;
    width: 0;
    margin-top: -7px;
    margin-left: -3px;
    height: 0;
    border-top: 7px solid transparent;
    border-bottom: 7px solid transparent;
    border-left: 9px solid #fff;
}