Add support for "original" format in YouTube (fixes issue #155)

youtube-dl

@@ -685,13 +685,14 @@ class YoutubeIE(InfoExtractor):
 	_AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
 	_NETRC_MACHINE = 'youtube'
 	# Listed in order of priority for the -b option
-	_available_formats = ['37', '22', '45', '35', '34', '43', '18', '6', '5', '17', '13', None]
+	_available_formats = ['38', '37', '22', '45', '35', '34', '43', '18', '6', '5', '17', '13', None]
 	_video_extensions = {
 		'13': '3gp',
 		'17': 'mp4',
 		'18': 'mp4',
 		'22': 'mp4',
 		'37': 'mp4',
+		'38': 'video',
 		'43': 'webm',
 		'45': 'webm',
 	}