[facebook] Fix extraction (closes #11926)

youtube_dl/extractor/facebook.py

@@ -12,14 +12,16 @@ from ..compat import (
     compat_urllib_parse_unquote_plus,
 )
 from ..utils import (
+    clean_html,
     error_to_compat_str,
     ExtractorError,
+    get_element_by_id,
     int_or_none,
+    js_to_json,
     limit_length,
     sanitized_Request,
+    try_get,
     urlencode_postdata,
-    get_element_by_id,
-    clean_html,
 )
 
 
@@ -243,14 +245,30 @@ class FacebookIE(InfoExtractor):
 
         video_data = None
 
+        def extract_video_data(instances):
+            for item in instances:
+                if item[1][0] == 'VideoConfig':
+                    video_item = item[2][0]
+                    if video_item.get('video_id') == video_id:
+                        return video_item['videoData']
+
         server_js_data = self._parse_json(self._search_regex(
-            r'handleServerJS\(({.+})(?:\);|,")', webpage, 'server js data', default='{}'), video_id)
+            r'handleServerJS\(({.+})(?:\);|,")', webpage,
-        for item in server_js_data.get('instances', []):
+            'server js data', default='{}'), video_id, fatal=False)
-            if item[1][0] == 'VideoConfig':
+
-                video_item = item[2][0]
+        if server_js_data:
-                if video_item.get('video_id') == video_id:
+            video_data = extract_video_data(server_js_data.get('instances', []))
-                    video_data = video_item['videoData']
+
-                    break
+        if not video_data:
+            server_js_data = self._parse_json(
+                self._search_regex(
+                    r'bigPipe\.onPageletArrive\(({.+?})\)\s*;\s*}\s*\)\s*,\s*["\']onPageletArrive\s+stream_pagelet',
+                    webpage, 'js data', default='{}'),
+                video_id, transform_source=js_to_json, fatal=False)
+            if server_js_data:
+                video_data = extract_video_data(try_get(
+                    server_js_data, lambda x: x['jsmods']['instances'],
+                    list) or [])
 
         if not video_data:
             if not fatal_if_no_video: