[mtv] Remove the templates from the mediagen url

youtube_dl/extractor/mtv.py

@@ -80,6 +80,8 @@ class MTVIE(InfoExtractor):
         video_id = self._id_from_uri(uri)
         self.report_extraction(video_id)
         mediagen_url = itemdoc.find('%s/%s' % (_media_xml_tag('group'), _media_xml_tag('content'))).attrib['url']
+        # Remove the templates, like &device={device}
+        mediagen_url = re.sub(r'&[^=]*?={.*?}(?=(&|$))', u'', mediagen_url)
         if 'acceptMethods' not in mediagen_url:
             mediagen_url += '&acceptMethods=fms'
         mediagen_page = self._download_webpage(mediagen_url, video_id,