.responsive_embed video,
.responsive_embed iframe,
.responsive_embed img,
.responsive_embed object,
.responsive_embed embed {
    max-width: 100%;
}

.youtube-container {
  position: relative;
  display: block;
  height: 0;
  padding: 0;
  padding-bottom: 56.25%;
  overflow: hidden;
}
.youtube-player {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  border: 0;
}