-# encoding: utf-8
+# coding: utf-8
 from __future__ import unicode_literals
 
 from .common import InfoExtractor
 
 
 class OktoberfestTVIE(InfoExtractor):
-    _VALID_URL = r'https?://www\.oktoberfest-tv\.de/[^/]+/[^/]+/video/(?P<id>[^/?#]+)'
+    _VALID_URL = r'https?://(?:www\.)?oktoberfest-tv\.de/[^/]+/[^/]+/video/(?P<id>[^/?#]+)'
 
     _TEST = {
         'url': 'http://www.oktoberfest-tv.de/de/kameras/video/hb-zelt',
             'id': 'hb-zelt',
             'ext': 'mp4',
             'title': 're:^Live-Kamera: Hofbräuzelt [0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}$',
-            'thumbnail': 're:^https?://.*\.jpg$',
+            'thumbnail': r're:^https?://.*\.jpg$',
             'is_live': True,
         },
         'params': {