Repository: yt-dlp/yt-dlp
File: yt_dlp/extractor/twitch.py (Python)

Code before:
                thumbnails.append({
                    'url': thumbnail_url,
                    'preference': quality_key(thumbnail_id),
                })
        return {
            'id': info['_id'],
            'title': info.get('title') or 'Untitled Broadcast',
            'description': info.get('description'),
            'duration': int_or_none(info.get('length')),
            'thumbnails': thumbnails,
            'uploader': info.get('channel', {}).get('display_name'),
            'uploader_id': info.get('channel', {}).get('name'),
            'timestamp': parse_iso8601(info.get('recorded_at')),
            'view_count': int_or_none(info.get('views')),
            'is_live': is_live,
            'was_live': True,
        }

    def _extract_chapters(self, info, item_id):
        if not info.get('moments'):
            game = traverse_obj(info, ('game', 'displayName'))
            if game:
                yield {'title': game}
            return

        for moment in info.get('moments') or []:
            start_time = int_or_none(moment.get('positionMilliseconds'), 1000)
            duration = int_or_none(moment.get('durationMilliseconds'), 1000)
            name = str_or_none(moment.get('description'))

            if start_time is None or duration is None:
                self.report_warning(f'Important chapter information missing for chapter {name}', item_id)
                continue
            yield {
                'start_time': start_time,
                'end_time': start_time + duration,
                'title': name,
            }

    def _extract_info_gql(self, info, item_id):
        vod_id = info.get('id') or item_id
        # id backward compatibility for download archives
        if vod_id[0] != 'v':
            vod_id = 'v%s' % vod_id
        thumbnail = url_or_none(info.get('previewThumbnailURL'))
        is_live = None
        if thumbnail:
            if thumbnail.endswith('/404_processing_{width}x{height}.png'):
                is_live, thumbnail = True, None
            else:
                is_live = False

Review comment (suggestion):
```suggestion
        for moment in info['moments']:
```
since the other cases are already handled

Code after:
                thumbnails.append({
                    'url': thumbnail_url,
                    'preference': quality_key(thumbnail_id),
                })
        return {
            'id': info['_id'],
            'title': info.get('title') or 'Untitled Broadcast',
            'description': info.get('description'),
            'duration': int_or_none(info.get('length')),
            'thumbnails': thumbnails,
            'uploader': info.get('channel', {}).get('display_name'),
            'uploader_id': info.get('channel', {}).get('name'),
            'timestamp': parse_iso8601(info.get('recorded_at')),
            'view_count': int_or_none(info.get('views')),
            'is_live': is_live,
            'was_live': True,
        }

    def _extract_chapters(self, info, item_id):
        if not info.get('moments'):
            game = traverse_obj(info, ('game', 'displayName'))
            if game:
                yield {'title': game}
            return

        for moment in info['moments']:
            start_time = int_or_none(moment.get('positionMilliseconds'), 1000)
            duration = int_or_none(moment.get('durationMilliseconds'), 1000)
            name = str_or_none(moment.get('description'))

            if start_time is None or duration is None:
                self.report_warning(f'Important chapter information missing for chapter {name}', item_id)
                continue
            yield {
                'start_time': start_time,
                'end_time': start_time + duration,
                'title': name,
            }

    def _extract_info_gql(self, info, item_id):
        vod_id = info.get('id') or item_id
        # id backward compatibility for download archives
        if vod_id[0] != 'v':
            vod_id = 'v%s' % vod_id
        thumbnail = url_or_none(info.get('previewThumbnailURL'))
        is_live = None
        if thumbnail:
            if thumbnail.endswith('/404_processing_{width}x{height}.png'):
                is_live, thumbnail = True, None
            else:
                is_live = False