[ie/facebook] Improve extraction

Partially addresses #4311

Authored by: jingtra, ringus1

Co-authored-by: Jing Kjeldsen <jingtra@gmail.com>

yt_dlp/extractor/facebook.py

@@ -500,6 +500,7 @@ class FacebookIE(InfoExtractor):
                 webpage, 'description', default=None)
             uploader_data = (
                 get_first(media, ('owner', {dict}))
+                or get_first(post, ('video', 'creation_story', 'attachments', ..., 'media', lambda k, v: k == 'owner' and v['name']))
                 or get_first(post, (..., 'video', lambda k, v: k == 'owner' and v['name']))
                 or get_first(post, ('node', 'actors', ..., {dict}))
                 or get_first(post, ('event', 'event_creator', {dict})) or {})
@@ -583,8 +584,8 @@ class FacebookIE(InfoExtractor):
         def extract_relay_prefetched_data(_filter):
             return traverse_obj(extract_relay_data(_filter), (
                 'require', (None, (..., ..., ..., '__bbox', 'require')),
-                lambda _, v: 'RelayPrefetchedStreamCache' in v, ..., ...,
-                '__bbox', 'result', 'data', {dict}), get_all=False) or {}
+                lambda _, v: any(key.startswith('RelayPrefetchedStreamCache') for key in v),
+                ..., ..., '__bbox', 'result', 'data', {dict}), get_all=False) or {}
 
         if not video_data:
             server_js_data = self._parse_json(self._search_regex([