.content img {
    max-width: 100%;
}

.youtube-wrapper {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 56.25%;
  margin-top: 10px;
  margin-bottom: 50px;
  border: 1px;
}
.youtube-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}