PaperModX/layouts/_default/_markup/render-image.html

{{- $url := urls.Parse .Destination -}}
{{- if $url.Scheme -}}
  {{/* third party image */}}
  <img loading="lazy" src="{{ .Destination | safeURL }}" alt="{{ $.Text }}" {{ with $.Title}} title="{{ . }}" {{ end }} />
{{- else -}}
  {{/* internal image */}}
  {{- $img := .Page.Resources.GetMatch .Destination -}}
  {{- if not $img -}}
    {{- $img = resources.Get .Destination -}}
  {{- end -}}

  {{- if $img -}}
    {{- if eq $img.MediaType.MainType "video" -}}
      <figure>
      <video class="video-shortcode" preload="metadata" controls>
        <source src="{{ $img.RelPermalink }}">
        There should have been a video here but your browser does not seem to support it.
      </video>
      </figure>
    {{- else -}}
      <img loading="lazy" src="{{ $img.RelPermalink }}" type="" alt="{{ $.Text }}" {{ with $.Title}} title="{{ . }}" {{ end }} />
    {{- end -}}
  {{- else -}}
    {{- warnf "No image found for %s from %s" .Destination .Page.File }}
  {{- end -}}
{{- end -}}