'display_id': slug,
'title': traverse_obj(episode_info, 'title', 'name'),
'description': episode_info.get('description'),
- 'creator': join_nonempty(
- traverse_obj(episode_info, ('createdBy','firstName')), traverse_obj(episode_info, ('createdBy','lastName')),
- delim=' '),
+ 'creator': join_nonempty(('createdBy', 'firstName'), ('createdBy', 'lastName'), from_dict=episode_info, delim=' '),
'duration': float_or_none(episode_info.get('duration')),
'is_live': episode_info.get('isLive'),
'thumbnail': traverse_obj(episode_info, 'thumbnail', 'image', expected_type=url_or_none),