update tests related to the change in youtube http format sorting

the change was done in 82156fdbf0

youtube_dl/extractor/freespeech.py

@@ -14,7 +14,7 @@ class FreespeechIE(InfoExtractor):
         'url': 'https://www.freespeech.org/video/obama-romney-campaign-colorado-ahead-debate-0',
         'info_dict': {
             'id': 'poKsVCZ64uU',
-            'ext': 'mp4',
+            'ext': 'webm',
             'title': 'Obama, Romney Campaign in Colorado Ahead of Debate',
             'description': 'Obama, Romney Campaign in Colorado Ahead of Debate',
             'uploader': 'freespeechtv',

youtube_dl/extractor/khanacademy.py

@@ -14,10 +14,10 @@ class KhanAcademyIE(InfoExtractor):
 
     _TESTS = [{
         'url': 'http://www.khanacademy.org/video/one-time-pad',
-        'md5': '7021db7f2d47d4fff89b13177cb1e8f4',
+        'md5': '7b391cce85e758fb94f763ddc1bbb979',
         'info_dict': {
             'id': 'one-time-pad',
-            'ext': 'mp4',
+            'ext': 'webm',
             'title': 'The one-time pad',
             'description': 'The perfect cipher',
             'duration': 176,

youtube_dl/extractor/mit.py

@@ -99,7 +99,7 @@ class OCWMITIE(InfoExtractor):
             'url': 'http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-041-probabilistic-systems-analysis-and-applied-probability-fall-2010/video-lectures/lecture-7-multiple-variables-expectations-independence/',
             'info_dict': {
                 'id': 'EObHWIEKGjA',
-                'ext': 'mp4',
+                'ext': 'webm',
                 'title': 'Lecture 7: Multiple Discrete Random Variables: Expectations, Conditioning, Independence',
                 'description': 'In this lecture, the professor discussed multiple random variables, expectations, and binomial distribution.',
                 'upload_date': '20121109',

youtube_dl/extractor/pyvideo.py

@@ -12,10 +12,10 @@ class PyvideoIE(InfoExtractor):
     _TESTS = [
         {
             'url': 'http://pyvideo.org/video/1737/become-a-logging-expert-in-30-minutes',
-            'md5': 'de317418c8bc76b1fd8633e4f32acbc6',
+            'md5': '520915673e53a5c5d487c36e0c4d85b5',
             'info_dict': {
                 'id': '24_4WWkSmNo',
-                'ext': 'mp4',
+                'ext': 'webm',
                 'title': 'Become a logging expert in 30 minutes',
                 'description': 'md5:9665350d466c67fb5b1598de379021f7',
                 'upload_date': '20130320',

youtube_dl/extractor/ted.py

@@ -73,7 +73,7 @@ class TEDIE(InfoExtractor):
         'add_ie': ['Youtube'],
         'info_dict': {
             'id': '_ZG8HBuDjgc',
-            'ext': 'mp4',
+            'ext': 'webm',
             'title': 'Douglas Adams: Parrots the Universe and Everything',
             'description': 'md5:01ad1e199c49ac640cb1196c0e9016af',
             'uploader': 'University of California Television (UCTV)',

youtube_dl/extractor/viki.py

@@ -176,13 +176,13 @@ class VikiIE(VikiBaseIE):
     }, {
         # youtube external
         'url': 'http://www.viki.com/videos/50562v-poor-nastya-complete-episode-1',
-        'md5': '216d1afdc0c64d1febc1e9f2bd4b864b',
+        'md5': '63f8600c1da6f01b7640eee7eca4f1da',
         'info_dict': {
             'id': '50562v',
-            'ext': 'mp4',
+            'ext': 'webm',
             'title': 'Poor Nastya [COMPLETE] - Episode 1',
             'description': '',
-            'duration': 607,
+            'duration': 606,
             'timestamp': 1274949505,
             'upload_date': '20101213',
             'uploader': 'ad14065n',

youtube_dl/extractor/vk.py

@@ -142,10 +142,10 @@ class VKIE(InfoExtractor):
             'url': 'https://vk.com/video276849682_170681728',
             'info_dict': {
                 'id': 'V3K4mi0SYkc',
-                'ext': 'mp4',
+                'ext': 'webm',
                 'title': "DSWD Awards 'Children's Joy Foundation, Inc.' Certificate of Registration and License to Operate",
                 'description': 'md5:bf9c26cfa4acdfb146362682edd3827a',
-                'duration': 179,
+                'duration': 178,
                 'upload_date': '20130116',
                 'uploader': "Children's Joy Foundation",
                 'uploader_id': 'thecjf',

youtube_dl/extractor/wimp.py

@@ -20,7 +20,7 @@ class WimpIE(InfoExtractor):
         'md5': '4e2986c793694b55b37cf92521d12bb4',
         'info_dict': {
             'id': 'clowncar',
-            'ext': 'mp4',
+            'ext': 'webm',
             'title': 'It\'s like a clown car.',
             'description': 'md5:0e56db1370a6e49c5c1d19124c0d2fb2',
         },