code: def get_videos_for_course(course_id, sort_field=None, sort_dir=SortDirection.asc, pagination_conf=None):
      return _get_videos_for_filter(
          {'courses__course_id': six.text_type(course_id), 'courses__is_hidden': False},
          sort_field,
          sort_dir,
          pagination_conf,
      )