From 75d00c38e81a18a8d1adfdb30f27b168b3a9b23c Mon Sep 17 00:00:00 2001
From: bashonly <88596187+bashonly@users.noreply.github.com>
Date: Sat, 12 Jul 2025 23:04:49 +0000
Subject: [PATCH] fullmatch the name

---
 yt_dlp/extractor/common.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/yt_dlp/extractor/common.py b/yt_dlp/extractor/common.py
index 9829aee81..d601e1751 100644
--- a/yt_dlp/extractor/common.py
+++ b/yt_dlp/extractor/common.py
@@ -1797,7 +1797,7 @@ def flatten(flight_data):
                 if not isinstance(data, dict):
                     return
                 children = data.pop('children', None)
-                if data and isinstance(name, str) and name.startswith('$L'):
+                if data and isinstance(name, str) and re.fullmatch(r'\$L[0-9a-f]+', name):
                     # It is useful hydration JSON data
                     nextjs_data[name[2:]] = data
                 flatten(children)