Unable to download webpage: HTTP Error 429: Too Many Requests

[vippendu]

youtube-dl https://www.youtube.com/watch?v=hcfGm247m4Q
[youtube] hcfGm247m4Q: 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; type youtube-dl -U to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

[vippendu]

File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 314, in _request_webpage
return self._downloader.urlopen(url_or_request)
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1674, 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)

[jaimeMF]

Duplicate of #5138.