[blinkx] Minor fix

Fixes: https://github.com/ytdl-org/youtube-dl/issues/28941

yt_dlp/extractor/blinkx.py

@@ -78,8 +78,8 @@ class BlinkxIE(InfoExtractor):
             'fullid': video_id,
             'title': data['title'],
             'formats': formats,
-            'uploader': data['channel_name'],
-            'timestamp': data['pubdate_epoch'],
+            'uploader': data.get('channel_name'),
+            'timestamp': data.get('pubdate_epoch'),
             'description': data.get('description'),
             'thumbnails': thumbnails,
             'duration': duration,