-    description = doc.find('.//information/detail').text
-    duration = int(doc.find('.//details/lengthSec').text)
-    uploader_node = doc.find('.//details/originChannelTitle')
-    uploader = None if uploader_node is None else uploader_node.text
-    uploader_id_node = doc.find('.//details/originChannelId')
-    uploader_id = None if uploader_id_node is None else uploader_id_node.text
-    upload_date = unified_strdate(doc.find('.//details/airtime').text)
+    description = xpath_text(doc, './/information/detail', 'description')
+    duration = int_or_none(xpath_text(doc, './/details/lengthSec', 'duration'))
+    uploader = xpath_text(doc, './/details/originChannelTitle', 'uploader')
+    uploader_id = xpath_text(doc, './/details/originChannelId', 'uploader id')
+    upload_date = unified_strdate(xpath_text(doc, './/details/airtime', 'upload date'))