exercise_html_purifier:
  html_profiles:
    default:
      config:
        HTML.Allowed: '*[id|class|style],style,img[src|alt|width],a[href|target],p,br,div,span,table,tbody,tr,td,th,strong,b,video[src],picture,source[src|type|media|srcset]'
        Attr.AllowedFrameTargets: '_blank'
        CSS.AllowTricky: 'true'
      elements:
        style:
          - Block
          - Inline
          - Common
          - { type: Text }