.screen_video {
  margin: 10px 4% 10px 4%;
  width: 92%;
  position: relative;
  max-height: 450px;
  height: calc(100vw * 0.6);
}

.on_video {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 1;
  height: 200px;
  z-index: 2;
}

.screen_video_iframe {
  width: 100%;
  height: 100%;
}