[generic] Use referrer from source kaltura embed URLs (#7409)

youtube_dl/extractor/generic.py

@@ -1694,7 +1694,9 @@ class GenericIE(InfoExtractor):
         mobj = (re.search(r"(?s)kWidget\.(?:thumb)?[Ee]mbed\(\{.*?'wid'\s*:\s*'_?(?P<partner_id>[^']+)',.*?'entry_?[Ii]d'\s*:\s*'(?P<id>[^']+)',", webpage) or
                 re.search(r'(?s)(?P<q1>["\'])(?:https?:)?//cdnapi(?:sec)?\.kaltura\.com/.*?(?:p|partner_id)/(?P<partner_id>\d+).*?(?P=q1).*?entry_?[Ii]d\s*:\s*(?P<q2>["\'])(?P<id>.+?)(?P=q2)', webpage))
         if mobj is not None:
-            return self.url_result('kaltura:%(partner_id)s:%(id)s' % mobj.groupdict(), 'Kaltura')
+            return self.url_result(smuggle_url(
+                'kaltura:%(partner_id)s:%(id)s' % mobj.groupdict(),
+                {'source_url': url}), 'Kaltura')
 
         # Look for Eagle.Platform embeds
         mobj = re.search(