diff --git a/services/youtube/youtube_handler.py b/services/youtube/youtube_handler.py
index 810aee6..b36989e 100644
--- a/services/youtube/youtube_handler.py
+++ b/services/youtube/youtube_handler.py
@@ -66,6 +66,8 @@ def is_youtube_url(url: str) -> bool:
 
 def extract_youtube_id(url: str) -> Optional[str]:
     """Extract YouTube video ID from various URL formats."""
+    if not isinstance(url, str):
+        return None
     parsed = urllib.parse.urlparse(url)
     if parsed.hostname in ("www.youtube.com", "youtube.com", "m.youtube.com"):
         if parsed.path == "/watch":
diff --git a/tests/test_youtube_extract_id_nonstring.py b/tests/test_youtube_extract_id_nonstring.py
new file mode 100644
index 0000000..e512b81
--- /dev/null
+++ b/tests/test_youtube_extract_id_nonstring.py
@@ -0,0 +1,15 @@
+from services.youtube.youtube_handler import extract_youtube_id
+
+
+def test_extract_youtube_id_handles_non_string_url():
+    # urllib.parse.urlparse raises AttributeError on a non-string, so a non-str
+    # url (e.g. from a JSON-decoded request body) crashed the extractor instead
+    # of being treated as "not a YouTube URL".
+    assert extract_youtube_id(123) is None
+    assert extract_youtube_id({"bad": 1}) is None
+    assert extract_youtube_id(["https://youtu.be/x"]) is None
+
+
+def test_extract_youtube_id_still_parses_real_urls():
+    assert extract_youtube_id("https://youtu.be/dQw4w9WgXcQ") == "dQw4w9WgXcQ"
+    assert extract_youtube_id("https://www.youtube.com/watch?v=abc123") == "abc123"