.announce__video {
  position: relative;
  max-width: 1264px;
  width: calc(100% - 44px);
  margin-left: auto;
  margin-right: auto;
}

.sticky {
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    width: 100%;
    max-width: 100%;
    margin-bottom: 0;
    padding-bottom: 0;
}

.sticky video {
  margin-bottom: -7px;
  width: 100%;
  height: auto;
}

.sticky:before,
.sticky:after {
    content: '';
    display: table;
}

@media(orientation: portrait) {
  .sticky video {
    width: auto;
    height: 100vh
    ;
  }
}

.studio__wrapper {
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-align-items: center;
  align-items: center;
  
  width: 100%;
  margin: 0;
  padding: 0;

  background: #fff;
}

.studio__image_box {
  -webkit-flex: 20% 1 1;
  flex: 20% 1 1;
  min-width: 110px;
}

@media(max-width: 331px) {
  .optional320 { display: none; }
}

.studio__image_box img {
  width: 100%;
  height: auto;
  float: left;
}

@media(max-width: 600px) {
  .optional { display:  none;  }
}

.IIV::-webkit-media-controls-play-button,
.IIV::-webkit-media-controls-start-playback-button {
    opacity: 0;
    pointer-events: none;
    width: 5px;
}