[extractor/generic] Detect manifest links via extension

Authored by: bashonly

yt_dlp/extractor/generic.py

@@ -2393,14 +2393,15 @@ class GenericIE(InfoExtractor):
             self.report_detected('direct video link')
             headers = smuggled_data.get('http_headers', {})
             format_id = str(m.group('format_id'))
+            ext = determine_ext(url)
             subtitles = {}
-            if format_id.endswith('mpegurl'):
+            if format_id.endswith('mpegurl') or ext == 'm3u8':
                 formats, subtitles = self._extract_m3u8_formats_and_subtitles(url, video_id, 'mp4', headers=headers)
                 info_dict.update(self._fragment_query(url))
-            elif format_id.endswith('mpd') or format_id.endswith('dash+xml'):
+            elif format_id.endswith('mpd') or format_id.endswith('dash+xml') or ext == 'mpd':
                 formats, subtitles = self._extract_mpd_formats_and_subtitles(url, video_id, headers=headers)
                 info_dict.update(self._fragment_query(url))
-            elif format_id == 'f4m':
+            elif format_id == 'f4m' or ext == 'f4m':
                 formats = self._extract_f4m_formats(url, video_id, headers=headers)
             else:
                 formats = [{