Add support for video.helsinki.fi archives
diff --git a/youtube_dl/extractor/__init__.py b/youtube_dl/extractor/__init__.py
index 3a8cd8a589b..9490df0d84b 100644
--- a/youtube_dl/extractor/__init__.py
+++ b/youtube_dl/extractor/__init__.py
@@ -91,6 +91,7 @@
 from .googleplus import GooglePlusIE
 from .googlesearch import GoogleSearchIE
 from .hark import HarkIE
+from .helsinki import HelsinkiIE
 from .hotnewhiphop import HotNewHipHopIE
 from .howcast import HowcastIE
 from .huffpost import HuffPostIE
diff --git a/youtube_dl/extractor/helsinki.py b/youtube_dl/extractor/helsinki.py
new file mode 100644
index 00000000000..2a54f3cca89
--- /dev/null
+++ b/youtube_dl/extractor/helsinki.py
@@ -0,0 +1,51 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import unicode_literals
+
+import re
+
+from .common import InfoExtractor
+
+
+class HelsinkiIE(InfoExtractor):
+    _VALID_URL = r'https?://video\.helsinki\.fi/Arkisto/flash\.php\?id=(?P<id>\d+)'
+    _TEST = {
+        'url': 'http://video.helsinki.fi/Arkisto/flash.php?id=20258',
+        'md5': 'cd829201b890905682eb194cbdea55d7',
+        'info_dict': {
+            'id': '20258',
+            'ext': 'mp4',
+            'title': 'Tietotekniikkafoorumi-iltapäivä',
+        }
+    }
+
+    def _real_extract(self, url):
+        mobj = re.match(self._VALID_URL, url)
+        vid = mobj.group('id')
+        webpage = self._download_webpage(url, vid)
+        formats = []
+        mobj = re.search('file=((\w+):[^&]+)', webpage)
+        if mobj: formats.append({
+            'ext': mobj.group(2),
+            'play_path': mobj.group(1),
+            'url': 'rtmp://flashvideo.it.helsinki.fi/vod/',
+            'player_url': 'http://video.helsinki.fi/player.swf',
+            'format_note': 'sd'
+        })
+
+        mobj = re.search('hd\.file=((\w+):[^&]+)', webpage)
+        if mobj: formats.append({
+            'ext': mobj.group(2),
+            'play_path': mobj.group(1),
+            'url': 'rtmp://flashvideo.it.helsinki.fi/vod/',
+            'player_url': 'http://video.helsinki.fi/player.swf',
+            'format_note': 'hd'
+        })
+
+        return {
+            'id': vid,
+            'title': self._og_search_title(webpage).replace('Video: ', ''),
+            'description': self._og_search_description(webpage),
+            'thumbnail': self._og_search_thumbnail(webpage),
+            'formats': formats
+        }
