.video-container,
.wp-block-embed {
  margin-left: auto;
  margin-right: auto;
}

.yt {
  position: relative;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.yt img,
.yt iframe,
.video-container iframe,
.video-container img {
  display: block;
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
}
.yt_play {
  position: absolute;
}
.yt_play:hover {
  cursor:pointer;
}
.yt_play::before { /* YouTubeアイコン */
  position: absolute;
  background: url(/public/uploads/2023/03/yt_icon_mono_light.png);
  content: "";
  background-size: 100%;
  width: 70px;
  height: 50px;
  top: 50%;
  left: 50%;
  transform : translate(-50%,-50%);
  opacity: .90;
  transition:.5s;
}
.yt_play:hover::before { /* YouTubeアイコン */
  cursor: pointer;
  background-image:url(/public/uploads/2020/11/yt_icon_rgb.png);
}