HTML

<div class="modify" data-youtube="95Lo9kiikOA"></div>
<div class="modify" data-isbn13="9784005009916"></div>
<div class="modify" data-metabase="abac037e-f970-4481-b69d-5b28ddeb2a2c"></div>

CSS

iframe.youtube-16-9 {
  width: 100%;
  height: auto;
  aspect-ratio: 1.78;
  max-width: 768px;
}
iframe.metabase-16-9 {
  width: 100%;
  height: auto;
  aspect-ratio: 1.78;
  max-width: 768px;
}