[videos] Fix saving imdb_id duplicates

tests/scrobbles_tests/test_scrobblers.py

@@ -3,6 +3,24 @@ from unittest.mock import MagicMock, patch
 from scrobbles.scrobblers import jellyfin_scrobble_media, mopidy_scrobble_media
 
 
+def test_jellyfin_scrobble_video_with_no_imdb_id():
+    with patch("scrobbles.scrobblers.Video") as mock_video_class:
+        mock_video_class.find_or_create.return_value = None
+
+        post_data = {
+            "ItemType": "Video",
+            "Name": "Test Video",
+            "Provider_imdb": "",
+            "PlaybackPosition": "00:05:00",
+            "NotificationType": "PlaybackProgress",
+            "UtcTimestamp": "2024-01-15T10:30:00Z",
+        }
+
+        result = jellyfin_scrobble_media(post_data, 1)
+
+        mock_video_class.find_or_create.assert_called_once_with(None)
+
+
 def test_jellyfin_scrobble_media_ignores_progress_with_zero_position():
 
     post_data = {