ERROR: Unable to download webpage: HTTP Error 404: Not Found (caused by HTTPError());

[wilebaldosh]

Checklist

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2019.09.28
• 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 -v "https://www.youtube.com/watch\?v\=3GcWYCXYPLQ\&list\=PLCBQA-saMgZd_tBqNBP-WIcjR4RrnpGnu"
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'https://www.youtube.com/watch\\?v\\=3GcWYCXYPLQ\\&list\\=PLCBQA-saMgZd_tBqNBP-WIcjR4RrnpGnu']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.09.28
[debug] Python version 2.7.10 (CPython) - Darwin-18.7.0-x86_64-i386-64bit
[debug] exe versions: none
[debug] Proxy map: {}
[generic] watch\?v\=3GcWYCXYPLQ\&list\=PLCBQA-saMgZd_tBqNBP-WIcjR4RrnpGnu: Requesting header
WARNING: Could not send HEAD request to https://www.youtube.com/watch\?v\=3GcWYCXYPLQ\&list\=PLCBQA-saMgZd_tBqNBP-WIcjR4RrnpGnu: HTTP Error 404: Not Found
[generic] watch\?v\=3GcWYCXYPLQ\&list\=PLCBQA-saMgZd_tBqNBP-WIcjR4RrnpGnu: Downloading webpage
ERROR: Unable to download webpage: HTTP Error 404: Not Found (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 2237, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 437, in open
    response = meth(req, response)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 550, in http_response
    'http', request, response, code, msg, hdrs)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 475, in error
    return self._call_chain(*args)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 409, in _call_chain
    result = func(*args)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 558, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)

Description

I try to download this playlist and I get the follow message:
ERROR: Unable to download webpage: HTTP Error 404: Not Found (caused by HTTPError());

[dstftw]

Superfluous escaping.