.clickable-video video {
  display: none;
}

.clickable-video .thumbnail {
  cursor: pointer;
}

.card-header .clickable-video {
  position: relative;
  padding-bottom: 56.25%;
  overflow: hidden;
}

.card-header .thumbnail, .card-header video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}