diff --git a/youtube_dl/InfoExtractors.py b/youtube_dl/InfoExtractors.py
index 256d106b10..01201a1454 100644
--- a/youtube_dl/InfoExtractors.py
+++ b/youtube_dl/InfoExtractors.py
@@ -103,8 +103,8 @@ class YoutubeIE(InfoExtractor):
 	_NEXT_URL_RE = r'[\?&]next_url=([^&]+)'
 	_NETRC_MACHINE = 'youtube'
 	# Listed in order of quality
-	_available_formats = ['38', '37', '22', '45', '35', '44', '34', '18', '43', '6', '5', '17', '13']
-	_available_formats_prefer_free = ['38', '37', '45', '22', '44', '35', '43', '34', '18', '6', '5', '17', '13']
+	_available_formats = ['38', '37', '46', '22', '45', '35', '44', '34', '18', '43', '6', '5', '17', '13']
+	_available_formats_prefer_free = ['38', '46', '37', '45', '22', '44', '35', '43', '34', '18', '6', '5', '17', '13']
 	_video_extensions = {
 		'13': '3gp',
 		'17': 'mp4',
@@ -115,6 +115,7 @@ class YoutubeIE(InfoExtractor):
 		'43': 'webm',
 		'44': 'webm',
 		'45': 'webm',
+		'46': 'webm',
 	}
 	_video_dimensions = {
 		'5': '240x400',
@@ -130,6 +131,7 @@ class YoutubeIE(InfoExtractor):
 		'43': '360x640',
 		'44': '480x854',
 		'45': '720x1280',
+		'46': '1080x1920',
 	}	
 	IE_NAME = u'youtube'
 
@@ -1977,14 +1979,14 @@ def _real_extract(self, url):
 					data = json_data['Post']
 				else:
 					data = json_data
-	
+
 				upload_date = datetime.datetime.strptime(data['datestamp'], '%m-%d-%y %H:%M%p').strftime('%Y%m%d')
 				video_url = data['media']['url']
 				umobj = re.match(self._URL_EXT, video_url)
 				if umobj is None:
 					raise ValueError('Can not determine filename extension')
 				ext = umobj.group(1)
-	
+
 				info = {
 					'id': data['item_id'],
 					'url': video_url,
@@ -2077,7 +2079,7 @@ class ComedyCentralIE(InfoExtractor):
 
 	def report_extraction(self, episode_id):
 		self._downloader.to_screen(u'[comedycentral] %s: Extracting information' % episode_id)
-	
+
 	def report_config_download(self, episode_id):
 		self._downloader.to_screen(u'[comedycentral] %s: Downloading configuration' % episode_id)
 
@@ -2605,7 +2607,6 @@ def get_urls(self, jsonData, fmt, bitrate='best'):
 			url_list = jsonData[fmt][bitrate]
 		except TypeError: # we have no bitrate info.
 			url_list = jsonData[fmt]
-				
 		return url_list
 
 	def check_urls(self, url_list):
@@ -2719,7 +2720,7 @@ def _real_extract(self, url):
 			info = {
 				'id': simplify_title(course + '_' + video),
 			}
-	
+
 			self.report_extraction(info['id'])
 			baseUrl = 'http://openclassroom.stanford.edu/MainFolder/courses/' + course + '/videos/'
 			xmlUrl = baseUrl + video + '.xml'