Unable to download vevo videos

[navneet35371]

yoout0fbounds@out0fbound:~$ youtube-dl https://www.youtube.com/watch?v=sEhy-RXkN[youtube] Setting language
[youtube] sEhy-RXkNo0: Downloading video webpage
[youtube] sEhy-RXkNo0: Downloading video info webpage
[youtube] sEhy-RXkNo0: Extracting video information
[youtube] sEhy-RXkNo0: Encrypted signatures detected.

[jaimeMF]

It works fine here, please post the full output you get when running youtube-dl 'https://www.youtube.com/watch?v=sEhy-RXkNo0' --verbose, like:

[debug] System config: []
[debug] User config: ['--keep-video', '--write-info-json', '--write-thumbnail', '--verbose']
[debug] Command-line args: ['https://www.youtube.com/watch?v=sEhy-RXkNo0']
[debug] Encodings: locale 'UTF-8', fs 'utf-8', out 'UTF-8', pref: 'UTF-8'
[debug] youtube-dl version 2014.02.22.1
[debug] Git HEAD: 2fcc873
[debug] Python version 3.3.4 - Darwin-13.0.0-x86_64-i386-64bit
[debug] Proxy map: {}
[youtube] Setting language
[youtube] sEhy-RXkNo0: Downloading webpage
[youtube] sEhy-RXkNo0: Downloading video info webpage
[youtube] sEhy-RXkNo0: Extracting video information
[youtube] sEhy-RXkNo0: Encrypted signatures detected.
[youtube] encrypted signature length 83 (40.42), itag 22, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 43, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 18, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 5, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 36, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 17, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (42.40), itag 137, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (42.40), itag 136, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (42.40), itag 135, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (42.40), itag 134, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (42.40), itag 133, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (42.40), itag 160, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (42.40), itag 140, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (42.40), itag 171, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 137, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 136, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 135, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 134, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 133, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 160, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 140, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 171, html5 player ima-vflrGwWV9
[info] Writing video description metadata as JSON to: Rihanna - Man Down-sEhy-RXkNo0.info.json
[youtube] sEhy-RXkNo0: Downloading thumbnail ...
[youtube] sEhy-RXkNo0: Writing thumbnail to: Rihanna - Man Down-sEhy-RXkNo0.jpg
[download] Destination: Rihanna - Man Down-sEhy-RXkNo0.mp4

[navneet35371]

the full output i get when running
youtube-dl https://www.youtube.com/watch?v=sEhy-RXkNo0' --verbose

[youtube] Setting language
[youtube] sEhy-RXkNo0: Downloading video webpage
[youtube] sEhy-RXkNo0: Downloading video info webpage
[youtube] sEhy-RXkNo0: Extracting video information
[youtube] sEhy-RXkNo0: Encrypted signatures detected.
[youtube] encrypted signature length 83 (40.42), itag 22, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 43, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 18, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 5, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 36, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 17, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 137, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 136, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 135, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 134, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 133, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 160, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 140, html5 player ima-vflrGwWV9
[youtube] encrypted signature length 83 (40.42), itag 171, html5 player ima-vflrGwWV9
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['https://www.youtube.com/watch?v=sEhy-RXkNo0', '--verbose']
[debug] youtube-dl version 2013.08.29
[debug] Python version 2.7.5+ - Linux-3.11.0-17-generic-x86_64-with-Ubuntu-13.10-saucy
[debug] Proxy map: {'ftp': 'http://172.31.1.4:8080/', 'all': 'socks://172.31.1.4:8080/', 'http': 'http://172.31.1.6:8080/', 'https': 'http://172.31.1.6:8080/', 'no': 'localhost,127.0.0.0/8,::1'}
ERROR: unable to download video
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 573, in download
    videos = self.extract_info(url)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 339, in extract_info
    return self.process_ie_result(ie_result, download=download)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 422, in process_ie_result
    for r in ie_result['entries']
  File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 369, in process_ie_result
    self.process_info(ie_result)
  File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 550, in process_info
    raise UnavailableVideoError(err)
UnavailableVideoError: HTTP Error 403: Forbidden

[jaimeMF]

You are running a really outdated version (2013.08.29 is nearly 6 months old, there have been a lot of fixes for youtube), run sudo youtube-dl -U (or use your distribution's package manager) to get the last version.
If you still have the problem with the last version, please comment and I'll reopen the issue.