[youtube] Further de-prioritize 3gp format

yt_dlp/extractor/youtube.py

@@ -3115,7 +3115,8 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                 'language': join_nonempty(audio_track.get('id', '').split('.')[0],
                                           'desc' if language_preference < -1 else ''),
                 'language_preference': language_preference,
-                'preference': -10 if is_damaged else None,
+                # Strictly de-prioritize damaged and 3gp formats
+                'preference': -10 if is_damaged else -2 if itag == '17' else None,
             }
             mime_mobj = re.match(
                 r'((?:[^/]+)/(?:[^;]+))(?:;\s*codecs="([^"]+)")?', fmt.get('mimeType') or '')