diff --git a/yt_dlp/extractor/porn91.py b/yt_dlp/extractor/porn91.py
index af4a0dc9c..7d16a1631 100644
--- a/yt_dlp/extractor/porn91.py
+++ b/yt_dlp/extractor/porn91.py
@@ -1,26 +1,48 @@
+import urllib.parse
 from .common import InfoExtractor
 from ..utils import (
-    parse_duration,
+    determine_ext,
     int_or_none,
+    parse_duration,
+    remove_end,
+    unified_strdate,
     ExtractorError,
 )
 
 
 class Porn91IE(InfoExtractor):
     IE_NAME = '91porn'
-    _VALID_URL = r'(?:https?://)(?:www\.|)91porn\.com/.+?\?viewkey=(?P<id>[\w\d]+)'
+    _VALID_URL = r'(?:https?://)(?:www\.|)91porn\.com/view_video.php\?([^#]+&)?viewkey=(?P<id>\w+)'
 
-    _TEST = {
+    _TESTS = [{
         'url': 'http://91porn.com/view_video.php?viewkey=7e42283b4f5ab36da134',
-        'md5': '7fcdb5349354f40d41689bd0fa8db05a',
+        'md5': 'd869db281402e0ef4ddef3c38b866f86',
         'info_dict': {
             'id': '7e42283b4f5ab36da134',
             'title': '18岁大一漂亮学妹，水嫩性感，再爽一次！',
+            'description': 'md5:1ff241f579b07ae936a54e810ad2e891',
             'ext': 'mp4',
             'duration': 431,
+            'upload_date': '20150520',
+            'comment_count': int,
+            'view_count': int,
+            'age_limit': 18,
+        }
+    }, {
+        'url': 'https://91porn.com/view_video.php?viewkey=7ef0cf3d362c699ab91c',
+        'md5': 'f8fd50540468a6d795378cd778b40226',
+        'info_dict': {
+            'id': '7ef0cf3d362c699ab91c',
+            'title': '真实空乘，冲上云霄第二部',
+            'description': 'md5:618bf9652cafcc66cd277bd96789baea',
+            'ext': 'mp4',
+            'duration': 248,
+            'upload_date': '20221119',
+            'comment_count': int,
+            'view_count': int,
             'age_limit': 18,
         }
-    }
+    }]
 
     def _real_extract(self, url):
         video_id = self._match_id(url)
@@ -29,32 +51,45 @@ class Porn91IE(InfoExtractor):
         webpage = self._download_webpage(
             'http://91porn.com/view_video.php?viewkey=%s' % video_id, video_id)
 
-        if '作为游客，你每天只可观看10个视频' in webpage:
-            raise ExtractorError('91 Porn says: Daily limit 10 videos exceeded', expected=True)
+        if '视频不存在,可能已经被删除或者被举报为不良内容!' in webpage:
+            raise ExtractorError('91 Porn says: Video does not exist', expected=True)
 
-        title = self._search_regex(
-            r'<div id="viewvideo-title">([^<]+)</div>', webpage, 'title')
-        title = title.replace('\n', '')
+        daily_limit = self._search_regex(
+            r'作为游客，你每天只可观看([\d]+)个视频', webpage, 'exceeded daily limit', default=None, fatal=False)
+        if daily_limit:
+            raise ExtractorError(f'91 Porn says: Daily limit {daily_limit} videos exceeded', expected=True)
 
         video_link_url = self._search_regex(
-            r'<textarea[^>]+id=["\']fm-video_link[^>]+>([^<]+)</textarea>',
-            webpage, 'video link')
-        videopage = self._download_webpage(video_link_url, video_id)
-
-        info_dict = self._parse_html5_media_entries(url, videopage, video_id)[0]
-
-        duration = parse_duration(self._search_regex(
-            r'时长:\s*</span>\s*(\d+:\d+)', webpage, 'duration', fatal=False))
+            r'document\.write\(\s*strencode2\s*\(\s*((?:"[^"]+")|(?:\'[^\']+\'))', webpage, 'video link')
+        video_link_url = self._search_regex(
+            r'src=["\']([^"\']+)["\']', urllib.parse.unquote(video_link_url), 'unquoted video link')
 
-        comment_count = int_or_none(self._search_regex(
-            r'留言:\s*</span>\s*(\d+)', webpage, 'comment count', fatal=False))
+        formats, subtitles = self._get_formats_and_subtitle(video_link_url, video_id)
 
-        info_dict.update({
+        return {
             'id': video_id,
-            'title': title,
-            'duration': duration,
-            'comment_count': comment_count,
-            'age_limit': self._rta_search(webpage),
-        })
+            'title': remove_end(self._html_extract_title(webpage).replace('\n', ''), 'Chinese homemade video').strip(),
+            'formats': formats,
+            'subtitles': subtitles,
+            'upload_date': unified_strdate(self._search_regex(
+                r'<span\s+class=["\']title-yakov["\']>(\d{4}-\d{2}-\d{2})</span>', webpage, 'upload_date', fatal=False)),
+            'description': self._html_search_regex(
+                r'<span\s+class=["\']more title["\']>\s*([^<]+)', webpage, 'description', fatal=False),
+            'duration': parse_duration(self._search_regex(
+                r'时长:\s*<span[^>]*>\s*(\d+(?::\d+){1,2})', webpage, 'duration', fatal=False)),
+            'comment_count': int_or_none(self._search_regex(
+                r'留言:\s*<span[^>]*>\s*(\d+)\s*</span>', webpage, 'comment count', fatal=False)),
+            'view_count': int_or_none(self._search_regex(
+                r'热度:\s*<span[^>]*>\s*(\d+)\s*</span>', webpage, 'view count', fatal=False)),
+            'age_limit': 18,
+        }
+
+    def _get_formats_and_subtitle(self, video_link_url, video_id):
+        ext = determine_ext(video_link_url)
+        if ext == 'm3u8':
+            formats, subtitles = self._extract_m3u8_formats_and_subtitles(video_link_url, video_id, ext='mp4')
+        else:
+            formats = [{'url': video_link_url, 'ext': ext}]
+            subtitles = {}
 
-        return info_dict
+        return formats, subtitles