docs: def oembed(url, class_=""):
      """
      Create OEmbed link
  
      {{ url | oembed }}
      :param url:
      :param class_:
      :return:
      """
      o = "<a href=\"{url}\" class=\"oembed {class_}\" ></a>".format(url=url,
                                                                     class_=class_)
      return Markup(o)