diff --git a/youtube_dl/extractor/audiomack.py b/youtube_dl/extractor/audiomack.py
index 04386f7f7..622b20989 100644
--- a/youtube_dl/extractor/audiomack.py
+++ b/youtube_dl/extractor/audiomack.py
@@ -26,13 +26,13 @@ class AudiomackIE(InfoExtractor):
         {
             'add_ie': ['Soundcloud'],
             'url': 'http://www.audiomack.com/song/xclusiveszone/take-kare',
-            'file': '172419696.mp3',
-            'info_dict':
-            {
+            'info_dict': {
+                'id': '172419696',
+                'ext': 'mp3',
                 'description': 'md5:1fc3272ed7a635cce5be1568c2822997',
                 'title': 'Young Thug ft Lil Wayne - Take Kare',
-                'uploader':'Young Thug World',
-                'upload_date':'20141016',
+                'uploader': 'Young Thug World',
+                'upload_date': '20141016',
             }
         },
     ]
diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index e80a2dad0..5b5e33cea 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -819,7 +819,8 @@ class InfoExtractor(object):
         return res
 
     def _set_cookie(self, domain, name, value, expire_time=None):
-        cookie = compat_cookiejar.Cookie(0, name, value, None, None, domain, None,
+        cookie = compat_cookiejar.Cookie(
+            0, name, value, None, None, domain, None,
             None, '/', True, False, expire_time, '', None, None, None)
         self._downloader.cookiejar.set_cookie(cookie)
 
diff --git a/youtube_dl/extractor/myspace.py b/youtube_dl/extractor/myspace.py
index e62614670..83414a232 100644
--- a/youtube_dl/extractor/myspace.py
+++ b/youtube_dl/extractor/myspace.py
@@ -88,6 +88,7 @@ class MySpaceIE(InfoExtractor):
                 self.report_warning(
                     '%s: No downloadable song on this page' % video_id)
                 return
+
             def search_data(name):
                 return self._search_regex(
                     r'''data-%s=([\'"])(?P<data>.*?)\1''' % name,
diff --git a/youtube_dl/extractor/udemy.py b/youtube_dl/extractor/udemy.py
index 0e4d386a8..5271611ac 100644
--- a/youtube_dl/extractor/udemy.py
+++ b/youtube_dl/extractor/udemy.py
@@ -97,11 +97,8 @@ class UdemyIE(InfoExtractor):
         if 'returnUrl' not in response:
             raise ExtractorError('Unable to log in')
 
-
-
     def _real_extract(self, url):
-        mobj = re.match(self._VALID_URL, url)
-        lecture_id = mobj.group('id')
+        lecture_id = self._match_id(url)
 
         lecture = self._download_json(
             'https://www.udemy.com/api-1.1/lectures/%s' % lecture_id,
diff --git a/youtube_dl/extractor/youtube.py b/youtube_dl/extractor/youtube.py
index 1cba40387..f452a90d8 100644
--- a/youtube_dl/extractor/youtube.py
+++ b/youtube_dl/extractor/youtube.py
@@ -44,9 +44,10 @@ class YoutubeBaseInfoExtractor(InfoExtractor):
     _LOGIN_REQUIRED = False
 
     def _set_language(self):
-        self._set_cookie('.youtube.com', 'PREF', 'f1=50000000&hl=en',
+        self._set_cookie(
+            '.youtube.com', 'PREF', 'f1=50000000&hl=en',
             # YouTube sets the expire time to about two months
-            expire_time=time.time() + 60*24*3600)
+            expire_time=time.time() + 2 * 30 * 24 * 3600)
 
     def _login(self):
         """
@@ -722,9 +723,11 @@ class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
                 # We fallback to the get_video_info pages (used by the embed page)
                 self.report_video_info_webpage_download(video_id)
                 for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
-                    video_info_url = (proto + '://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
-                        % (video_id, el_type))
-                    video_info_webpage = self._download_webpage(video_info_url,
+                    video_info_url = (
+                        '%s://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
+                        % (proto, video_id, el_type))
+                    video_info_webpage = self._download_webpage(
+                        video_info_url,
                         video_id, note=False,
                         errnote='unable to download video info webpage')
                     video_info = compat_parse_qs(video_info_webpage)