Unable to download channel with no username/channel/ username

[Virtix21]

Hello, i'm using ver 2016.08.28

youtube-dl -v ytuser:UCsqjHFMB_JYTaEnf_vmTNqg

[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-v', u'ytuser:UCsqjHFMB_JYTaEnf_vmTNqg']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2016.08.28
[debug] Python version 2.7.11 - Windows-7-6.1.7601-SP1
[debug] exe versions: ffmpeg N-81489-ga37e6dd, ffprobe N-81489-ga37e6dd
[debug] Proxy map: {}
[youtube:user] UCsqjHFMB_JYTaEnf_vmTNqg: Downloading channel page
WARNING: Unable to download webpage: HTTP Error 404: Not Found
[youtube:user] UCsqjHFMB_JYTaEnf_vmTNqg: Downloading page #1
ERROR: Unable to download webpage: HTTP Error 404: Not Found (caused by HTTPErro
r()); please report this issue on https://yt-dl.org/bug . Make sure you are usin
g the latest version; see https://yt-dl.org/update on how to update. Be sure t
o call youtube-dl with the --verbose flag and include its complete output.
File "c:\python27\lib\site-packages\youtube_dl\extractor\common.py", line 394,
in _request_webpage
return self._downloader.urlopen(url_or_request)
File "c:\python27\lib\site-packages\youtube_dl\YoutubeDL.py", line 1998, in ur
lopen
return self._opener.open(req, timeout=self._socket_timeout)
File "c:\python27\lib\urllib2.py", line 437, in open
response = meth(req, response)
File "c:\python27\lib\urllib2.py", line 550, in http_response
'http', request, response, code, msg, hdrs)
File "c:\python27\lib\urllib2.py", line 475, in error
return self._call_chain(args)
File "c:\python27\lib\urllib2.py", line 409, in _call_chain
result = func(args)
File "c:\python27\lib\urllib2.py", line 558, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)

Here is a real channel, sorry about the other one with an example channel, this is a real one and i should've known.

[phihag]

This is a channel, not a user.

Simply run youtube-dl https://www.youtube.com/channel/UCsqjHFMB_JYTaEnf_vmTNqg to download the channel.

[Virtix21]

@phihag Thank you!