diff --git a/yt_dlp/extractor/tiktok.py b/yt_dlp/extractor/tiktok.py
index c58538394..4a35a241c 100644
--- a/yt_dlp/extractor/tiktok.py
+++ b/yt_dlp/extractor/tiktok.py
@@ -25,7 +25,7 @@ from ..utils import (
 
 
 class TikTokBaseIE(InfoExtractor):
-    _APP_VERSIONS = [('20.9.3', '293'), ('20.4.3', '243'), ('20.2.1', '221'), ('20.1.2', '212'), ('20.0.4', '204')]
+    _APP_VERSIONS = [('26.1.3', '260103'), ('26.1.2', '260102'), ('26.1.1', '260101'), ('25.6.2', '250602')]
     _WORKING_APP_VERSION = None
     _APP_NAME = 'trill'
     _AID = 1180
@@ -33,7 +33,6 @@ class TikTokBaseIE(InfoExtractor):
     _UPLOADER_URL_FORMAT = 'https://www.tiktok.com/@%s'
     _WEBPAGE_HOST = 'https://www.tiktok.com/'
     QUALITIES = ('360p', '540p', '720p', '1080p')
-    _session_initialized = False
 
     @staticmethod
     def _create_url(user_id, video_id):
@@ -43,12 +42,6 @@ class TikTokBaseIE(InfoExtractor):
         return self._parse_json(get_element_by_id(
             'SIGI_STATE|sigi-persisted-data', webpage, escape_value=False), display_id)
 
-    def _real_initialize(self):
-        if self._session_initialized:
-            return
-        self._request_webpage(HEADRequest('https://www.tiktok.com'), None, note='Setting up session', fatal=False)
-        TikTokBaseIE._session_initialized = True
-
     def _call_api_impl(self, ep, query, manifest_app_version, video_id, fatal=True,
                        note='Downloading API JSON', errnote='Unable to download API page'):
         self._set_cookie(self._API_HOSTNAME, 'odin_tt', ''.join(random.choice('0123456789abcdef') for _ in range(160)))
@@ -289,7 +282,7 @@ class TikTokBaseIE(InfoExtractor):
             'uploader_url': user_url,
             'track': music_track,
             'album': str_or_none(music_info.get('album')) or None,
-            'artist': music_author,
+            'artist': music_author or None,
             'timestamp': int_or_none(aweme_detail.get('create_time')),
             'formats': formats,
             'subtitles': self.extract_subtitles(aweme_detail, aweme_id),
@@ -522,7 +515,7 @@ class TikTokIE(TikTokBaseIE):
             'repost_count': int,
             'comment_count': int,
         },
-        'expected_warnings': ['trying feed workaround', 'Unable to find video in feed']
+        'skip': 'This video is unavailable',
     }, {
         # Auto-captions available
         'url': 'https://www.tiktok.com/@hankgreen1/video/7047596209028074758',
@@ -530,18 +523,11 @@ class TikTokIE(TikTokBaseIE):
     }]
 
     def _extract_aweme_app(self, aweme_id):
-        try:
-            aweme_detail = self._call_api('aweme/detail', {'aweme_id': aweme_id}, aweme_id,
-                                          note='Downloading video details', errnote='Unable to download video details').get('aweme_detail')
-            if not aweme_detail:
-                raise ExtractorError('Video not available', video_id=aweme_id)
-        except ExtractorError as e:
-            self.report_warning(f'{e.orig_msg}; trying feed workaround')
-            feed_list = self._call_api('feed', {'aweme_id': aweme_id}, aweme_id,
-                                       note='Downloading video feed', errnote='Unable to download video feed').get('aweme_list') or []
-            aweme_detail = next((aweme for aweme in feed_list if str(aweme.get('aweme_id')) == aweme_id), None)
-            if not aweme_detail:
-                raise ExtractorError('Unable to find video in feed', video_id=aweme_id)
+        feed_list = self._call_api('feed', {'aweme_id': aweme_id}, aweme_id,
+                                   note='Downloading video feed', errnote='Unable to download video feed').get('aweme_list') or []
+        aweme_detail = next((aweme for aweme in feed_list if str(aweme.get('aweme_id')) == aweme_id), None)
+        if not aweme_detail:
+            raise ExtractorError('Unable to find video in feed', video_id=aweme_id)
         return self._parse_aweme_video_app(aweme_detail)
 
     def _real_extract(self, url):
@@ -572,6 +558,7 @@ class TikTokIE(TikTokBaseIE):
 class TikTokUserIE(TikTokBaseIE):
     IE_NAME = 'tiktok:user'
     _VALID_URL = r'https?://(?:www\.)?tiktok\.com/@(?P<id>[\w\.-]+)/?(?:$|[#?])'
+    _WORKING = False
     _TESTS = [{
         'url': 'https://tiktok.com/@corgibobaa?lang=en',
         'playlist_mincount': 45,
@@ -708,6 +695,7 @@ class TikTokBaseListIE(TikTokBaseIE):
 class TikTokSoundIE(TikTokBaseListIE):
     IE_NAME = 'tiktok:sound'
     _VALID_URL = r'https?://(?:www\.)?tiktok\.com/music/[\w\.-]+-(?P<id>[\d]+)[/?#&]?'
+    _WORKING = False
     _QUERY_NAME = 'music_id'
     _API_ENDPOINT = 'music/aweme'
     _TESTS = [{
@@ -731,6 +719,7 @@ class TikTokSoundIE(TikTokBaseListIE):
 class TikTokEffectIE(TikTokBaseListIE):
     IE_NAME = 'tiktok:effect'
     _VALID_URL = r'https?://(?:www\.)?tiktok\.com/sticker/[\w\.-]+-(?P<id>[\d]+)[/?#&]?'
+    _WORKING = False
     _QUERY_NAME = 'sticker_id'
     _API_ENDPOINT = 'sticker/aweme'
     _TESTS = [{
@@ -750,6 +739,7 @@ class TikTokEffectIE(TikTokBaseListIE):
 class TikTokTagIE(TikTokBaseListIE):
     IE_NAME = 'tiktok:tag'
     _VALID_URL = r'https?://(?:www\.)?tiktok\.com/tag/(?P<id>[^/?#&]+)'
+    _WORKING = False
     _QUERY_NAME = 'ch_id'
     _API_ENDPOINT = 'challenge/aweme'
     _TESTS = [{