figure {
  margin: 0;
}
figure img {
  display: block;
}

img {
  max-width: 100%;
  height: auto;
}

figcaption {
  margin: 16px 0;
}

.field--name-field-media-oembed-video {
  height: 0;
  padding-bottom: 66%;
  position: relative;
}

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