documentation/layouts/shortcodes/bilibili.html

<figure>
    <div style="position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden;">
      <iframe src="https://player.bilibili.com/player.html?aid={{ .Get "id" }}" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border:0;" allowfullscreen  title="{{ .Get "caption" }}"></iframe>
    </div>
  
    <figcaption>
      <p>{{- .Get "caption" | markdownify -}}</p>
    </figcaption>
  </figure>