encrypted signature length 88 (47.40)

[KalleDK]

youtube-dl -f 22 F90Cw4l-8NY -v
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-f', '22', 'F90Cw4l-8NY', '-v']
[debug] youtube-dl version 2013.08.28
[debug] Python version 2.7.5 - FreeBSD-9.1-RELEASE-amd64-64bit-ELF
[debug] Proxy map: {}
[youtube] Setting language
[youtube] F90Cw4l-8NY: Downloading video webpage
[youtube] F90Cw4l-8NY: Downloading video info webpage
[youtube] F90Cw4l-8NY: Extracting video information
[youtube] F90Cw4l-8NY: Encrypted signatures detected.
[youtube] encrypted signature length 88 (47.40), itag 46, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 37, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 45, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 22, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 44, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 35, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 43, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 34, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 18, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 5, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 36, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 17, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 137, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 248, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 136, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 247, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 135, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 244, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 245, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 246, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 134, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 243, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 133, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 242, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 160, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 139, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 140, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 141, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 171, html5 player vflapUV9V
[youtube] encrypted signature length 88 (47.40), itag 172, html5 player vflapUV9V
ERROR: unable to download video
Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 560, in download
videos = self.extract_info(url)
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 327, in extract_info
return self.process_ie_result(ie_result, download=download)
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 410, in process_ie_result
for r in ie_result['entries']
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 357, in process_ie_result
self.process_info(ie_result)
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 537, in process_info
raise UnavailableVideoError(err)
UnavailableVideoError: HTTP Error 403: Forbidden

[jaimeMF]

duplicate of #1328 (fixed in the git repo), thanks for reporting.