smil_url = '%s/%s/video/%s/smil.xml' % (base_url, lecture_slug, part_id)
smil = self._download_smil(smil_url, lecture_id)
info = self._parse_smil(smil, smil_url, lecture_id)
smil_url = '%s/%s/video/%s/smil.xml' % (base_url, lecture_slug, part_id)
smil = self._download_smil(smil_url, lecture_id)
info = self._parse_smil(smil, smil_url, lecture_id)