-# encoding: utf-8
+# coding: utf-8
 from __future__ import unicode_literals
 
 from .common import InfoExtractor
 
 
 class KickStarterIE(InfoExtractor):
-    _VALID_URL = r'https?://www\.kickstarter\.com/projects/(?P<id>[^/]*)/.*'
+    _VALID_URL = r'https?://(?:www\.)?kickstarter\.com/projects/(?P<id>[^/]*)/.*'
     _TESTS = [{
         'url': 'https://www.kickstarter.com/projects/1404461844/intersection-the-story-of-josh-grant/description',
         'md5': 'c81addca81327ffa66c642b5d8b08cab',
             'ext': 'mp4',
             'title': 'Power Drive 2000',
         },
-        'expected_warnings': ['OpenGraph description'],
     }]
 
     def _real_extract(self, url):
             'id': video_id,
             'url': video_url,
             'title': title,
-            'description': self._og_search_description(webpage),
+            'description': self._og_search_description(webpage, default=None),
             'thumbnail': thumbnail,
         }