[ie/youtube] Fix `heatmap` extraction (#8299)

Closes #8189
Authored by: bashonly

yt_dlp/extractor/youtube.py

@@ -3292,16 +3292,15 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                                           chapter_time, chapter_title, duration)
             for contents in content_list)), [])
 
-    def _extract_heatmap_from_player_overlay(self, data):
-        content_list = traverse_obj(data, (
-            'playerOverlays', 'playerOverlayRenderer', 'decoratedPlayerBarRenderer', 'decoratedPlayerBarRenderer', 'playerBar',
-            'multiMarkersPlayerBarRenderer', 'markersMap', ..., 'value', 'heatmap', 'heatmapRenderer', 'heatMarkers', {list}))
-        return next(filter(None, (
-            traverse_obj(contents, (..., 'heatMarkerRenderer', {
-                'start_time': ('timeRangeStartMillis', {functools.partial(float_or_none, scale=1000)}),
-                'end_time': {lambda x: (x['timeRangeStartMillis'] + x['markerDurationMillis']) / 1000},
-                'value': ('heatMarkerIntensityScoreNormalized', {float_or_none}),
-            })) for contents in content_list)), None)
+    def _extract_heatmap(self, data):
+        return traverse_obj(data, (
+            'frameworkUpdates', 'entityBatchUpdate', 'mutations',
+            lambda _, v: v['payload']['macroMarkersListEntity']['markersList']['markerType'] == 'MARKER_TYPE_HEATMAP',
+            'payload', 'macroMarkersListEntity', 'markersList', 'markers', ..., {
+                'start_time': ('startMillis', {functools.partial(float_or_none, scale=1000)}),
+                'end_time': {lambda x: (int(x['startMillis']) + int(x['durationMillis'])) / 1000},
+                'value': ('intensityScoreNormalized', {float_or_none}),
+            })) or None
 
     def _extract_comment(self, comment_renderer, parent=None):
         comment_id = comment_renderer.get('commentId')
@@ -4435,7 +4434,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                 or self._extract_chapters_from_description(video_description, duration)
                 or None)
 
-            info['heatmap'] = self._extract_heatmap_from_player_overlay(initial_data)
+            info['heatmap'] = self._extract_heatmap(initial_data)
 
         contents = traverse_obj(
             initial_data, ('contents', 'twoColumnWatchNextResults', 'results', 'results', 'contents'),