diff --git a/Public/YoutubeFacade/Infrastructure/Services/YoutubeFacadeContentFilter.php b/Public/YoutubeFacade/Infrastructure/Services/YoutubeFacadeContentFilter.php
index 39dd2766..d2eea249 100644
--- a/Public/YoutubeFacade/Infrastructure/Services/YoutubeFacadeContentFilter.php
+++ b/Public/YoutubeFacade/Infrastructure/Services/YoutubeFacadeContentFilter.php
@@ -59,9 +59,15 @@ final class YoutubeFacadeContentFilter
 
         // Return original content if regex failed
         if ($result === null) {
+            file_put_contents('/tmp/yt-debug.log', date('H:i:s') . " preg_replace FAILED (null)\n", FILE_APPEND);
             return $content;
         }
 
+        // Debug: verify facades in result
+        $facadeCount = substr_count($result, 'data-video-id');
+        $iframeCount = substr_count($result, 'youtube.com/embed');
+        file_put_contents('/tmp/yt-debug.log', date('H:i:s') . " RESULT: {$facadeCount} facades, {$iframeCount} iframes remaining\n", FILE_APPEND);
+
         return $result;
     }
 }