use single traversal

yt_dlp/extractor/youtube.py

@@ -3316,12 +3316,14 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
 
         info = {
             'id': comment_id,
-            'text': try_get(comment_entity_payload, lambda x: x['properties']['content']['content'], str),
-            'like_count': parse_count(try_get(comment_entity_payload, lambda x: x['toolbar']['likeCountA11y'], str)) or 0,
-            'author_id': traverse_obj(comment_entity_payload, ('author', 'channelId', {self.ucid_or_none})),
-            'author': try_get(comment_entity_payload, lambda x: x['author']['displayName'], str),
-            'author_thumbnail': traverse_obj(comment_entity_payload, ('author', 'avatarThumbnailUrl', {url_or_none})),
             'parent': parent or 'root',
+            **traverse_obj(comment_entity_payload, {
+                'text': ('properties', 'content', 'content', {str}),
+                'like_count': ('toolbar', 'likeCountA11y', {parse_count}),
+                'author_id': ('author', 'channelId', {self.ucid_or_none}),
+                'author': ('author', 'displayName', {str}),
+                'author_thumbnail': ('author', 'avatarThumbnailUrl', {url_or_none}),
+            }),
         }
 
         # Timestamp is an estimate calculated from the current time and time_text