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

Code before:
            'channel_id': channel_id,
            'channel_url': channel_url,
            'title': title,
            'uploader_id': channel_handle,
            'uploader_url': format_field(channel_handle, None, 'https://www.youtube.com/%s', default=None),
            # See above. YouTube sets videoCountText to the subscriber text in search channel renderers.
            # However, in feed/channels this is set correctly to the subscriber count
            'channel_follower_count': traverse_obj(
                renderer, 'subscriberCountText', 'videoCountText', expected_type=self._get_count),
            'thumbnails': self._extract_thumbnails(renderer, 'thumbnail'),
            'playlist_count': (
                # videoCountText may be the subscriber count
                self._get_count(renderer, 'videoCountText')
                if self._get_count(renderer, 'subscriberCountText') is not None else None),
            'description': self._get_text(renderer, 'descriptionSnippet'),
            'channel_is_verified': True if self._has_badge(
                self._extract_badges(traverse_obj(renderer, 'ownerBadges')), BadgeType.VERIFIED) else None,
        }

    def _grid_entries(self, grid_renderer):
        for item in grid_renderer['items']:
            if not isinstance(item, dict):
                continue
            if lookup_view_model := item.get('lockupViewModel'):
                entry = self._extract_lookup_view_model(lookup_view_model)
                if entry:
                    yield entry
                continue
            renderer = self._extract_basic_item_renderer(item)
            if not isinstance(renderer, dict):
                continue
            title = self._get_text(renderer, 'title')

            # playlist
            playlist_id = renderer.get('playlistId')
            if playlist_id:
                yield self.url_result(
                    f'https://www.youtube.com/playlist?list={playlist_id}',
                    ie=YoutubeTabIE.ie_key(), video_id=playlist_id,
                    video_title=title)
                continue
            # video
            video_id = renderer.get('videoId')
            if video_id:
                yield self._extract_video(renderer)
                continue
            # channel
            channel_id = renderer.get('channelId')
            if channel_id:
                yield self._extract_channel_renderer(renderer)
                continue

Review comment (refactor):
```suggestion
                if entry := self._extract_lookup_view_model(lookup_view_model):
```

Code after:
            'channel_id': channel_id,
            'channel_url': channel_url,
            'title': title,
            'uploader_id': channel_handle,
            'uploader_url': format_field(channel_handle, None, 'https://www.youtube.com/%s', default=None),
            # See above. YouTube sets videoCountText to the subscriber text in search channel renderers.
            # However, in feed/channels this is set correctly to the subscriber count
            'channel_follower_count': traverse_obj(
                renderer, 'subscriberCountText', 'videoCountText', expected_type=self._get_count),
            'thumbnails': self._extract_thumbnails(renderer, 'thumbnail'),
            'playlist_count': (
                # videoCountText may be the subscriber count
                self._get_count(renderer, 'videoCountText')
                if self._get_count(renderer, 'subscriberCountText') is not None else None),
            'description': self._get_text(renderer, 'descriptionSnippet'),
            'channel_is_verified': True if self._has_badge(
                self._extract_badges(traverse_obj(renderer, 'ownerBadges')), BadgeType.VERIFIED) else None,
        }

    def _grid_entries(self, grid_renderer):
        for item in grid_renderer['items']:
            if not isinstance(item, dict):
                continue
            if lockup_view_model := traverse_obj(item, ('lockupViewModel', {dict})):
                if entry := self._extract_lockup_view_model(lockup_view_model):
                    yield entry
                continue
            renderer = self._extract_basic_item_renderer(item)
            if not isinstance(renderer, dict):
                continue
            title = self._get_text(renderer, 'title')

            # playlist
            playlist_id = renderer.get('playlistId')
            if playlist_id:
                yield self.url_result(
                    f'https://www.youtube.com/playlist?list={playlist_id}',
                    ie=YoutubeTabIE.ie_key(), video_id=playlist_id,
                    video_title=title)
                continue
            # video
            video_id = renderer.get('videoId')
            if video_id:
                yield self._extract_video(renderer)
                continue
            # channel
            channel_id = renderer.get('channelId')
            if channel_id:
                yield self._extract_channel_renderer(renderer)
                continue
            # generic endpoint URL support