.center {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 8%;
  }
.image_center{
    display: flex;
    justify-content: center;
}
.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
}
.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}