Unable to download webpage: HTTP Error 503: Service Temporarily Unavailable (Platzi)

[aaRonRJ]

Checklist

• [-] I'm reporting a broken site support issue
• [-] I've verified that I'm running youtube-dl version 2020.05.08
• [-] I've checked that all provided URLs are alive and playable in a browser
• [-] I've checked that all URLs and arguments with special characters are properly quoted or escaped
• [-] I've searched the bugtracker for similar bug reports including closed ones
• [-] I've read bugs section in FAQ

Verbose log

youtube-dl -u 'user' -p 'password' -v 'https://platzi.com/clases/1050-programacion-basica/5104-que-es-htmlcssjs/'
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-u', u'PRIVATE', u'-p', u'PRIVATE', u'-v', u'https://platzi.com/clases/1050-programacion-basica/5104-que-es-htmlcssjs/']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.05.08
[debug] Python version 2.7.17 (CPython) - Linux-5.3.0-51-generic-x86_64-with-LinuxMint-19.3-tricia
[debug] exe versions: none
[debug] Proxy map: {}
[Platzi] Downloading login page
ERROR: Unable to download webpage: HTTP Error 503: Service Temporarily Unavailable (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.
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 627, in _request_webpage
    return self._downloader.urlopen(url_or_request)
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2238, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/usr/lib/python2.7/urllib2.py", line 435, in open
    response = meth(req, response)
  File "/usr/lib/python2.7/urllib2.py", line 548, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.7/urllib2.py", line 473, in error
    return self._call_chain(*args)
  File "/usr/lib/python2.7/urllib2.py", line 407, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/urllib2.py", line 556, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)

Description

WRITE DESCRIPTION HERE

[aaRonRJ]

@dstftw
Where is it duplicated?