diff --git a/brozzler/ydl.py b/brozzler/ydl.py
index 4c4b7ad..9caf662 100644
--- a/brozzler/ydl.py
+++ b/brozzler/ydl.py
@@ -33,6 +33,7 @@ thread_local = threading.local()
 
 
 def should_ytdlp(page, site):
+    # called only after we've passed needs_browsing() check
     if page.status_code != 200:
         return False