/* Video player  */
.field--name-field-media-oembed-video {
  position: relative;
  padding-block-end: 56.25%;
  /* 16:9, for an aspect ratio of 1:1 change to this value to 100% */
}

.field--name-field-media-oembed-video iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}