diff --git a/youtube_dl/extractor/gaskrank.py b/youtube_dl/extractor/gaskrank.py
index c40d35772..d4e7cf5f0 100644
--- a/youtube_dl/extractor/gaskrank.py
+++ b/youtube_dl/extractor/gaskrank.py
@@ -1,13 +1,13 @@
 # coding: utf-8
 from __future__ import unicode_literals
 
-from re import sub
+import re
 from .common import InfoExtractor
 from ..utils import js_to_json
 
 
 class GaskrankIE(InfoExtractor):
-    _VALID_URL = r'https?://(?:www\.)?gaskrank\.tv/tv(?:/[^/]+)+/(?P<id>[^/]+).htm'
+    _VALID_URL = r'https?://(?:www\.)?gaskrank\.tv/tv(?:/[^/]+)+/(?P<id>[^/]+)\.htm'
     _TEST = {
         'url': 'http://www.gaskrank.tv/tv/motorrad-fun/strike-einparken-durch-anfaenger-crash-mit-groesserem-flurschaden.htm',
         'md5': '200e28a405f6919b914a83f8adfc5739',
@@ -21,24 +21,24 @@ class GaskrankIE(InfoExtractor):
 
     def _real_extract(self, url):
         def fix_json(code):
-            return sub(r'}[\s]*?,[\s]*?}', r'}}', js_to_json(code))
+            return re.sub(r'}[\s]*?,[\s]*?}', r'}}', js_to_json(code))
 
         display_id = self._match_id(url)
         webpage = self._download_webpage(url, display_id)
-        video_id = self._search_regex(r'https?://movies.gaskrank.tv/([^-]*?).mp4', webpage, 'video id')
-        categories = self._search_regex(r'https?://(?:www\.)?gaskrank\.tv/tv(?:/([^/]+))+/[^/]+.htm', url, 'categories')
-        title = self._search_regex(r'movieName[\s\S]*?\'([^\']*?)\'', webpage, 'config', default='{}')
-        thumbnail = self._search_regex(r'poster[\s\S]*?\'([^\']*?)\'', webpage, 'config', default='{}')
+        video_id = self._search_regex(r'https?://movies\.gaskrank\.tv/([^-]*?)\.mp4', webpage, 'video id')
+        categories = self._search_regex(r'https?://(?:www\.)?gaskrank\.tv/tv(?:/([^/]+))+/[^/]+\.htm', url, 'categories', default=None)
+        title = self._search_regex(r'movieName[^\']*?\'([^\']*?)\'', webpage, 'title')
+        thumbnail = self._search_regex(r'poster[^\']*?\'([^\']*?)\'', webpage, 'thumbnail', default=None)
         playlist = self._parse_json(
-            self._search_regex(r'playlist:[\s\S]*?\[([\s\S]*?)]', webpage, 'config', default='{}'),
+            self._search_regex(r'playlist:[\s\S]*?\[([\s\S]*?)]', webpage, 'playlist', default='{}'),
             video_id, transform_source=fix_json, fatal=False)
         formats = []
-        for key in playlist:
+        for key in sorted(playlist):
             formats.append({
                 'url': playlist[key]['src'],
                 'format_id': key,
-                'quality': playlist[key]['quality'],
-                'resolution': playlist[key]['quality']})
+                'quality': playlist[key].get('quality'),
+                'resolution': playlist[key].get('quality')})
 
         return {
             'id': video_id,