[streamcloud] Modernize

youtube_dl/extractor/streamcloud.py

@@ -40,8 +40,7 @@ def _real_extract(self, url):
             ''', orig_webpage)
         post = compat_urllib_parse.urlencode(fields)
 
-        self.to_screen('%s: Waiting for timeout' % video_id)
-        time.sleep(12)
+        self._sleep(12, video_id)
         headers = {
             b'Content-Type': b'application/x-www-form-urlencoded',
         }