.oembed > .content,
.oembed-facebook > .content,
.oembed-youtube > .content,
.oembed-twitter > .content,
.oembed-instagram > .content {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-justify-content: center;
    -ms-justify-content: center;
    justify-content: center;
    -webkit-align-items: center;
    -ms-align-items: center;
    align-items: center;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
}

.oembed > .content > div {
    width: 100%;
}

.oembed-facebook .fb_iframe_widget,
.oembed-facebook .fb_iframe_widget > span,
.oembed-facebook .fb_iframe_widget > span > iframe,
.node .fb_iframe_widget,
.node .fb_iframe_widget > span,
.node .fb_iframe_widget > span > iframe,
.oembed-youtube > .content > iframe {
  max-width: 100% !important;
  width: 100% !important;
  overflow: hidden !important;
  display: block;
}

.node .field.field-name-field-image.oembed.YouTube > .content > iframe {
    max-width: 100%;
    width: 800px;
    max-height: 400px;
    height: 400px;
    display: block;
    position: relative;
}

.embed-responsive {
    position: relative;
    display: block;
    height: 0;
    padding: 0;
    overflow: hidden;
}
.embed-responsive .embed-responsive-item,
.embed-responsive iframe,
.embed-responsive embed,
.embed-responsive object,
.embed-responsive video {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  height: 100%;
  width: 100%;
  border: 0;
}
.embed-responsive-16by9 {
  padding-bottom: 56.25%;
}
.embed-responsive-4by3 {
  padding-bottom: 75%;
}

.field-name-body iframe {
  max-width: 100%;
}