/* Video player  */
.field--name-field-media-oembed-video .field__item {
  position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* Aspect ratio 16:9 - for an aspect ratio of 1: 1 change to this value to 100% */
    height: 0;
}

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