HTTP Error 429: Too Many Requests

[zlay69]

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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youtube-dl 'https://www.youtube.com/watch?t=4&v=BaW_jenozKc' --verbose
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'https://www.youtube.com/watch?t=4&v=BaW_jenozKc', u'--verbose']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.05.21.2
[debug] Python version 2.6.6 - Linux-2.6.32-042stab111.12-x86_64-with-centos-6.7-Final
[debug] exe versions: none
[debug] Proxy map: {}
[youtube] BaW_jenozKc: Downloading webpage
ERROR: Unable to download webpage: HTTP Error 429: Too Many Requests (caused by HTTPError()); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see https://yt-dl.org/update on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
File "/usr/lib/python2.6/site-packages/youtube_dl/extractor/common.py", line 388, in _request_webpage
return self._downloader.urlopen(url_or_request)
File "/usr/lib/python2.6/site-packages/youtube_dl/YoutubeDL.py", line 1946, in urlopen
return self._opener.open(req, timeout=self._socket_timeout)
File "/usr/lib64/python2.6/urllib2.py", line 397, in open
response = meth(req, response)
File "/usr/lib64/python2.6/urllib2.py", line 510, in http_response
'http', request, response, code, msg, hdrs)
File "/usr/lib64/python2.6/urllib2.py", line 435, in error
return self._call_chain(_args)
File "/usr/lib64/python2.6/urllib2.py", line 369, in _call_chain
result = func(_args)
File "/usr/lib64/python2.6/urllib2.py", line 518, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)

...

### Description of your *issue*, suggested solution and other information

wen i try tu use the api raise  HTTP Error 429: Too Many Requests 

[dstftw]

1. https://github.com/rg3/youtube-dl#http-error-429-too-many-requests-or-402-payment-required
2. #5138.