docs: def get_trailerLinks(self):
          """Returns dictionary with trailer names as keys and list of
          trailer urls as values. Each trailer can have more links due
          to different qualities.
  
          Example:
          {'Trailer':['url1','url2'],'Featurette':['url1','url2']}
          """
          if self._trailerLinks:
              return self._trailerLinks
  
          wip = WebIncParser("http://trailers.apple.com" + self.baseURL,
                             "includes/playlists/web.inc")
  
          self._trailerLinks = wip.getTrailers()
          return self._trailerLinks