[gaskrank] Add new extractor
diff --git a/youtube_dl/extractor/extractors.py b/youtube_dl/extractor/extractors.py
index 5ba8efb0eaa..937356d9abb 100644
--- a/youtube_dl/extractor/extractors.py
+++ b/youtube_dl/extractor/extractors.py
@@ -330,6 +330,7 @@
 from .gamersyde import GamersydeIE
 from .gamespot import GameSpotIE
 from .gamestar import GameStarIE
+from .gaskrank import GaskrankIE
 from .gazeta import GazetaIE
 from .gdcvault import GDCVaultIE
 from .generic import GenericIE
diff --git a/youtube_dl/extractor/gaskrank.py b/youtube_dl/extractor/gaskrank.py
new file mode 100644
index 00000000000..972b47bf2d1
--- /dev/null
+++ b/youtube_dl/extractor/gaskrank.py
@@ -0,0 +1,121 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+import re
+from .common import InfoExtractor
+from ..utils import float_or_none
+from ..utils import int_or_none
+from ..utils import js_to_json
+from ..utils import unified_strdate
+
+
+class GaskrankIE(InfoExtractor):
+    """InfoExtractor for gaskrank.tv"""
+    _VALID_URL = r'https?://(?:www\.)?gaskrank\.tv/tv/(?P<categories>[^/]+)/(?P<id>[^/]+)\.html?'
+    _TESTS = [
+        {
+            'url': 'http://www.gaskrank.tv/tv/motorrad-fun/strike-einparken-durch-anfaenger-crash-mit-groesserem-flurschaden.htm',
+            'md5': '1ae88dbac97887d85ebd1157a95fc4f9',
+            'info_dict': {
+                'id': '201601/26955',
+                'ext': 'mp4',
+                'title': 'Strike! Einparken können nur Männer - Flurschaden hält sich in Grenzen *lol*',
+                'thumbnail': r're:^https?://.*\.jpg$',
+                'categories': ['motorrad-fun'],
+                'display_id': 'strike-einparken-durch-anfaenger-crash-mit-groesserem-flurschaden',
+                'uploader_id': 'Bikefun',
+                'upload_date': '20170110',
+                'uploader_url': None,
+            }
+        },
+        {
+            'url': 'http://www.gaskrank.tv/tv/racing/isle-of-man-tt-2011-michael-du-15920.htm',
+            'md5': 'c33ee32c711bc6c8224bfcbe62b23095',
+            'info_dict': {
+                'id': '201106/15920',
+                'ext': 'mp4',
+                'title': 'Isle of Man - Michael Dunlop vs Guy Martin - schwindelig kucken',
+                'thumbnail': r're:^https?://.*\.jpg$',
+                'categories': ['racing'],
+                'display_id': 'isle-of-man-tt-2011-michael-du-15920',
+                'uploader_id': 'IOM',
+                'upload_date': '20160506',
+                'uploader_url': 'www.iomtt.com',
+            }
+        }
+    ]
+
+    def _real_extract(self, url):
+        """extract information from gaskrank.tv"""
+        def fix_json(code):
+            """Removes trailing comma in json: {{},} --> {{}}"""
+            return re.sub(r',\s*}', r'}', js_to_json(code))
+
+        display_id = self._match_id(url)
+        webpage = self._download_webpage(url, display_id)
+        categories = [re.match(self._VALID_URL, url).group('categories')]
+        title = self._search_regex(
+            r'movieName\s*:\s*\'([^\']*)\'',
+            webpage, 'title')
+        thumbnail = self._search_regex(
+            r'poster\s*:\s*\'([^\']*)\'',
+            webpage, 'thumbnail', default=None)
+
+        mobj = re.search(
+            r'Video von:\s*(?P<uploader_id>[^|]*?)\s*\|\s*vom:\s*(?P<upload_date>[0-9][0-9]\.[0-9][0-9]\.[0-9][0-9][0-9][0-9])',
+            webpage)
+        if mobj is not None:
+            uploader_id = mobj.groupdict().get('uploader_id')
+            upload_date = unified_strdate(mobj.groupdict().get('upload_date'))
+
+        uploader_url = self._search_regex(
+            r'Homepage:\s*<[^>]*>(?P<uploader_url>[^<]*)',
+            webpage, 'uploader_url', default=None)
+        tags = re.findall(
+            r'/tv/tags/[^/]+/"\s*>(?P<tag>[^<]*?)<',
+            webpage)
+
+        view_count = self._search_regex(
+            r'class\s*=\s*"gkRight"(?:[^>]*>\s*<[^>]*)*icon-eye-open(?:[^>]*>\s*<[^>]*)*>\s*(?P<view_count>[0-9\.]*)',
+            webpage, 'view_count', default=None)
+        if view_count:
+            view_count = int_or_none(view_count.replace('.', ''))
+
+        average_rating = self._search_regex(
+            r'itemprop\s*=\s*"ratingValue"[^>]*>\s*(?P<average_rating>[0-9,]+)',
+            webpage, 'average_rating')
+        if average_rating:
+            average_rating = float_or_none(average_rating.replace(',', '.'))
+
+        playlist = self._parse_json(
+            self._search_regex(
+                r'playlist\s*:\s*\[([^\]]*)\]',
+                webpage, 'playlist', default='{}'),
+            display_id, transform_source=fix_json, fatal=False)
+
+        video_id = self._search_regex(
+            r'https?://movies\.gaskrank\.tv/([^-]*?)(-[^\.]*)?\.mp4',
+            playlist.get('0').get('src'), 'video id')
+
+        formats = []
+        for key in playlist:
+            formats.append({
+                'url': playlist[key]['src'],
+                'format_id': key,
+                'quality': playlist[key].get('quality')})
+        self._sort_formats(formats, field_preference=['format_id'])
+
+        return {
+            'id': video_id,
+            'title': title,
+            'formats': formats,
+            'thumbnail': thumbnail,
+            'categories': categories,
+            'display_id': display_id,
+            'uploader_id': uploader_id,
+            'upload_date': upload_date,
+            'uploader_url': uploader_url,
+            'tags': tags,
+            'view_count': view_count,
+            'average_rating': average_rating,
+        }

- [x] At least skimmed through [adding new extractor tutorial](https://github.com/rg3/youtube-dl#adding-support-for-a-new-site) and [youtube-dl coding conventions](https://github.com/rg3/youtube-dl#youtube-dl-coding-conventions) sections
- [x] [Searched](https://github.com/rg3/youtube-dl/search?q=is%3Apr&type=Issues) the bugtracker for similar pull requests
- [x] I am the original author of this code and I am willing to release it under [Unlicense](http://unlicense.org/)
- [x] New extractor

Added extractor for gaskrank.tv, a german-language motorcycle fun video site.
