youtube-dl worked one time then reported these/this error

[ghost]

youtube-dl --verbose https://www.youtube.com/results?search_query=klezmer&page=2
[1] 7617
mark@Lexington:~$ [debug] System config: []
[debug] User config: []
[debug] Command-line args: ['--verbose', 'https://www.youtube.com/results?search_query=klezmer']
[debug] Encodings: locale 'UTF-8', fs 'UTF-8', out 'UTF-8', pref: 'UTF-8'
[debug] youtube-dl version 2014.02.17
[debug] Python version 2.7.6 - Linux-3.13.0-35-generic-x86_64-with-Ubuntu-14.04-trusty
[debug] Proxy map: {'no': 'localhost,127.0.0.0/8,::1'}
[download] Downloading playlist: results
[youtube:user] results: Downloading video ids from 1 to 51
ERROR: Unable to download webpage: HTTP Error 403: Forbidden; please report this issue on https://yt-dl.org/bug . Be sure to call youtube-dl with the --verbose flag and include its complete output. Make sure you are using the latest version; type youtube-dl -U to update.
File "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/common.py", line 191, in _request_webpage
return self._downloader.urlopen(url_or_request)
File "/usr/lib/python2.7/dist-packages/youtube_dl/YoutubeDL.py", line 1157, in urlopen
return self._opener.open(req)
File "/usr/lib/python2.7/urllib2.py", line 410, in open
response = meth(req, response)
File "/usr/lib/python2.7/urllib2.py", line 523, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/lib/python2.7/urllib2.py", line 448, in error
return self._call_chain(_args)
File "/usr/lib/python2.7/urllib2.py", line 382, in _call_chain
result = func(_args)
File "/usr/lib/python2.7/urllib2.py", line 531, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)

and here there the terminal output stops and I have to CTRL-C to break out. Sorry for not knowing what to do here, this is my 1st time reporting a bug.

[naglis]

Hi,
the ampersand (&) in your URL is interpreted by Bash, and the URL that Youtube DL receives gets cut off (you can see that in the line [debug] Command-line args: ['--verbose', 'https://www.youtube.com/results?search_query=klezmer']). To avoid that, you can escape the ampersand with a backslash (\):

youtube-dl https://www.youtube.com/results?search_query=klezmer\&page=2

or enclose the whole URL in quotes:

youtube-dl 'https://www.youtube.com/results?search_query=klezmer&page=2'

[naglis]

Oh, also, you are using an outdated version of youtube-dl, and you'll need to update to a more recent version (at least 2014.07.25) for it to work. Type youtube-dl -U to update.

[jaimeMF]

@naglis is right, using the last version of youtube-dl should work and you must escape the & .
I'm closing the issue, but if it doesn't work, please comment here and we'll reopen it.