.post-item__media:not(.post-item__media--gallery) {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  max-width: 100%;
}
.post-item__media:not(.post-item__media--gallery) iframe,
.post-item__media:not(.post-item__media--gallery) object,
.post-item__media:not(.post-item__media--gallery) .embed
.embed-container object,
.embed-container .embed {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
.embed-container {
  margin-bottom: 30px;
}
.post-excerpt .embed-container {
  height: auto;
  padding-bottom: 0;
}