[TikTokVM] Fix redirect to user URL

Closes #3349, Closes #3351

yt_dlp/extractor/tiktok.py

@@ -15,6 +15,7 @@ from ..compat import (
 from ..utils import (
     ExtractorError,
     HEADRequest,
+    UnsupportedError,
     get_first,
     int_or_none,
     join_nonempty,
@@ -890,5 +891,8 @@ class TikTokVMIE(InfoExtractor):
     }]
 
     def _real_extract(self, url):
-        return self.url_result(self._request_webpage(
-            HEADRequest(url), self._match_id(url), headers={'User-Agent': 'facebookexternalhit/1.1'}).geturl(), TikTokIE)
+        new_url = self._request_webpage(
+            HEADRequest(url), self._match_id(url), headers={'User-Agent': 'facebookexternalhit/1.1'}).geturl()
+        if self.suitable(new_url):  # Prevent infinite loop in case redirect fails
+            raise UnsupportedError(new_url)
+        return self.url_result(new_url)