@keyframes heart {
  0%, 40%, 80%, 100% {
    transform: scale(1);
  }
  20%, 60% {
    transform: scale(1.15);
  }
}
.heart {
    animation: heart 1000ms infinite;
    color: #7490d0;
}

.video-wrapper {
  position: relative;
  display: block;
  height: 0;
  padding: 0;
  overflow: hidden;
  padding-bottom: 56.25%;
}
.video-wrapper > iframe {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}