diff --git a/youtube_dl/extractor/jove.py b/youtube_dl/extractor/jove.py
index a7110b683..cf73cd753 100644
--- a/youtube_dl/extractor/jove.py
+++ b/youtube_dl/extractor/jove.py
@@ -1,64 +1,80 @@
-# coding: utf-8
 from __future__ import unicode_literals
 
 import re
-from datetime import datetime
 
 from .common import InfoExtractor
-from ..utils import determine_ext, ExtractorError
+from ..utils import (
+    ExtractorError,
+    unified_strdate
+)
 
 
 class JoveIE(InfoExtractor):
     _VALID_URL = r'https?://(?:www\.)?jove\.com/video/(?P<id>[0-9]+)'
     _CHAPTERS_URL = 'http://www.jove.com/video-chapters?videoid={video_id:}'
-    _TEST = {
-        'url': 'http://www.jove.com/video/2744/electrode-positioning-montage-transcranial-direct-current',
-        'md5': '93723888d82dbd6ba8b3d7d0cd65dd2b',
-        'info_dict': {
-            'id': '2744',
-            'ext': 'mp4',
-            'title': 'Electrode Positioning and Montage in Transcranial Direct Current Stimulation',
-            'description': 'Transcranial direct current stimulation (tDCS) is an established technique to modulate cortical excitability1,2. It has been ...',
-            'thumbnail': 're:^https?://.*\.png$',
-            'upload_date': '20110523',
-        }
-    }
+    _TESTS = [
+        {
+            'url': 'http://www.jove.com/video/2744/electrode-positioning-montage-transcranial-direct-current',
+            'md5': '93723888d82dbd6ba8b3d7d0cd65dd2b',
+            'info_dict': {
+                'id': '2744',
+                'ext': 'mp4',
+                'title': 'Electrode Positioning and Montage in Transcranial Direct Current Stimulation',
+                'description': 'md5:015dd4509649c0908bc27f049e0262c6',
+                'thumbnail': 're:^https?://.*\.png$',
+                'upload_date': '20110523',
+            }
+        },
+        {
+            'url': 'http://www.jove.com/video/51796/culturing-caenorhabditis-elegans-axenic-liquid-media-creation',
+            'md5': '914aeb356f416811d911996434811beb',
+            'info_dict': {
+                'id': '51796',
+                'ext': 'mp4',
+                'title': 'Culturing Caenorhabditis elegans in Axenic Liquid Media and Creation of Transgenic Worms by Microparticle Bombardment',
+                'description': 'md5:35ff029261900583970c4023b70f1dc9',
+                'thumbnail': 're:^https?://.*\.png$',
+                'upload_date': '20140802',
+            }
+        },
+
+    ]
 
     def _real_extract(self, url):
         mobj = re.match(self._VALID_URL, url)
         video_id = mobj.group('id')
 
         webpage = self._download_webpage(url, video_id)
-        title = self._html_search_meta('citation_title', webpage, 'title')
-        thumbnail = self._og_search_thumbnail(webpage)
-        description = self._html_search_meta(
-            'description', webpage, 'description', fatal=False)
-        publish_date = self._html_search_meta(
-            'citation_publication_date', webpage, 'publish date', fatal=False)
-        if publish_date:
-            publish_date = datetime.strptime(publish_date,
-                                             '%Y/%m/%d').strftime('%Y%m%d')
 
-        # Not the same as video_id.
         chapters_id = self._html_search_regex(
             r'/video-chapters\?videoid=([0-9]+)', webpage, 'chapters id')
+
         chapters_xml = self._download_xml(
             self._CHAPTERS_URL.format(video_id=chapters_id),
-            video_id, note='Downloading chapter XML',
-            errnote='Failed to download chapter XML'
-        )
+            video_id, note='Downloading chapters XML',
+            errnote='Failed to download chapters XML')
+
         video_url = chapters_xml.attrib.get('video')
         if not video_url:
             raise ExtractorError('Failed to get the video URL')
 
-        ext = determine_ext(video_url)
+        title = self._html_search_meta('citation_title', webpage, 'title')
+        thumbnail = self._og_search_thumbnail(webpage)
+        description = self._html_search_regex(
+            r'<div id="section_body_summary"><p class="jove_content">(.+?)</p>',
+            webpage, 'description', fatal=False)
+        publish_date = unified_strdate(self._html_search_meta(
+            'citation_publication_date', webpage, 'publish date', fatal=False))
+        comment_count = self._html_search_regex(
+            r'<meta name="num_comments" content="(\d+) Comments?"',
+            webpage, 'comment count', fatal=False)
 
         return {
             'id': video_id,
             'title': title,
             'url': video_url,
-            'ext': ext,
             'thumbnail': thumbnail,
             'description': description,
             'upload_date': publish_date,
+            'comment_count': comment_count,
         }
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 65b492fb3..1081a9368 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -827,6 +827,7 @@ def unified_strdate(date_str):
         '%b %dnd %Y %I:%M%p',
         '%b %dth %Y %I:%M%p',
         '%Y-%m-%d',
+        '%Y/%m/%d',
         '%d.%m.%Y',
         '%d/%m/%Y',
         '%Y/%m/%d %H:%M:%S',