[vlive] New extractor for vlive.tv
diff --git a/youtube_dl/extractor/__init__.py b/youtube_dl/extractor/__init__.py
index 1c53a5632df..6bee5b63cc4 100644
--- a/youtube_dl/extractor/__init__.py
+++ b/youtube_dl/extractor/__init__.py
@@ -735,6 +735,7 @@
     VKIE,
     VKUserVideosIE,
 )
+from .vlive import VLiveIE
 from .vodlocker import VodlockerIE
 from .voicerepublic import VoiceRepublicIE
 from .vporn import VpornIE
diff --git a/youtube_dl/extractor/vlive.py b/youtube_dl/extractor/vlive.py
new file mode 100644
index 00000000000..a456f8217f0
--- /dev/null
+++ b/youtube_dl/extractor/vlive.py
@@ -0,0 +1,86 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+import hmac
+from hashlib import sha1
+from base64 import b64encode
+from time import time
+
+from .common import InfoExtractor
+from ..utils import (
+    ExtractorError,
+    determine_ext
+)
+from ..compat import compat_urllib_parse
+
+
+class VLiveIE(InfoExtractor):
+    IE_NAME = 'vlive'
+    # www.vlive.tv/video/ links redirect to m.vlive.tv/video/ for mobile devices
+    _VALID_URL = r'https?://(?:(www|m)\.)?vlive\.tv/video/(?P<id>[0-9]+)'
+    _TEST = {
+        'url': 'http://m.vlive.tv/video/1326',
+        'md5': 'cc7314812855ce56de70a06a27314983',
+        'info_dict': {
+            'id': '1326',
+            'ext': 'mp4',
+            'title': '[V] Girl\'s Day\'s Broadcast',
+            'creator': 'Girl\'s Day',
+        },
+    }
+    _SECRET = 'rFkwZet6pqk1vQt6SxxUkAHX7YL3lmqzUMrU4IDusTo4jEBdtOhNfT4BYYAdArwH'
+
+    def _real_extract(self, url):
+        video_id = self._match_id(url)
+
+        webpage = self._download_webpage(
+            'http://m.vlive.tv/video/%s' % video_id,
+            video_id, note='Download video page')
+
+        title = self._og_search_title(webpage)
+        thumbnail = self._og_search_thumbnail(webpage)
+        creator = self._html_search_regex(
+            r'<span[^>]+class="name">([^<>]+)</span>', webpage, 'creator')
+        
+        url = 'http://global.apis.naver.com/globalV/globalV/vod/%s/playinfo?' % video_id
+        msgpad = '%.0f' % (time() * 1000)
+        md = b64encode(
+            hmac.new(self._SECRET.encode('ascii'),
+                     (url[:255] + msgpad).encode('ascii'), sha1).digest()
+        )
+        url += '&' + compat_urllib_parse.urlencode({'msgpad': msgpad, 'md': md})
+        playinfo = self._download_json(url, video_id, 'Downloading video json')
+
+        if playinfo.get('message', '') != 'success':
+            raise ExtractorError(playinfo.get('message', 'JSON request unsuccessful'))
+
+        if not playinfo.get('result'):
+            raise ExtractorError('No videos found.')
+
+        formats = []
+        for vid in playinfo['result'].get('videos', {}).get('list', []):
+            formats.append({
+                'url': vid['source'],
+                'ext': 'mp4',
+                'abr': vid.get('bitrate', {}).get('audio'),
+                'vbr': vid.get('bitrate', {}).get('video'),
+                'format_id': vid['encodingOption']['name'],
+                'height': vid.get('height'),
+                'width': vid.get('width'),
+            })
+        self._sort_formats(formats)
+
+        subtitles = {}
+        for caption in playinfo['result'].get('captions', {}).get('list', []):
+            subtitles[caption['language']] = [
+                {'ext': determine_ext(caption['source'], default_ext='vtt'),
+                 'url': caption['source']}]
+
+        return {
+            'id': video_id,
+            'title': title,
+            'creator': creator,
+            'thumbnail': thumbnail,
+            'formats': formats,
+            'subtitles': subtitles,
+        }

"V" http://www.vlive.tv is a live broadcasting mobile platform targeted at South Korean celebrities

Similar to Periscope, videos are available for viewing after the live broadcast, but only on the app for now.

Example: http://m.vlive.tv/video/1326
