[ESPN] broken with python 3.6 (works with 3.7)

[2011]

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2020.09.14
• 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 -f best -v 'https://www.espn.com/nba/story/_/id/29895442/nba-players-show-no-mercy-twitter-clippers-nuggets-game-7-shocker'
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--restrict-filenames', '-o', '%(title)s-%(id)s-%(uploader)s.%(ext)s', '-w', '-f', 'best', '-v', 'https://www.espn.com/nba/story/_/id/29895442/nba-players-show-no-mercy-twitter-clippers-nuggets-game-7-shocker']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.09.14
[debug] Python version 3.6.11 (CPython) - Linux-4.4.221-gentoo-x86_64-Intel-R-_Core-TM-_i5_CPU_750_@_2.67GHz-with-gentoo-2.4.1
[debug] exe versions: ffmpeg 3.4.6, ffprobe 3.4.6, rtmpdump 2.4
[debug] Proxy map: {}
[ESPNArticle] nba-players-show-no-mercy-twitter-clippers-nuggets-game-7-shocker: Downloading webpage
[ESPN] 29895463: Downloading JSON metadata
[ESPN] 29895463: Downloading SMIL file
[ESPN] 29895463: Downloading f4m manifest
Traceback (most recent call last):
  File "/usr/lib/python-exec/python3.6/youtube-dl", line 11, in <module>
    load_entry_point('youtube-dl==2020.9.14', 'console_scripts', 'youtube-dl')()
  File "/usr/lib64/python3.6/site-packages/youtube_dl/__init__.py", line 474, in main
    _real_main(argv)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/__init__.py", line 464, in _real_main
    retcode = ydl.download(all_urls)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/YoutubeDL.py", line 2019, in download
    url, force_generic_extractor=self.params.get('force_generic_extractor', False))
  File "/usr/lib64/python3.6/site-packages/youtube_dl/YoutubeDL.py", line 808, in extract_info
    return self.process_ie_result(ie_result, download, extra_info)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/YoutubeDL.py", line 870, in process_ie_result
    extra_info=extra_info)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/YoutubeDL.py", line 797, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/extractor/espn.py", line 161, in _real_extract
    traverse_source(links.get('source', {}))
  File "/usr/lib64/python3.6/site-packages/youtube_dl/extractor/espn.py", line 125, in traverse_source
    if base_source_id else source_id)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/extractor/espn.py", line 120, in traverse_source
    extract_source(source, base_source_id)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/extractor/espn.py", line 139, in extract_source
    source_url, video_id, f4m_id=source_id, fatal=False))
  File "/usr/lib64/python3.6/site-packages/youtube_dl/extractor/common.py", line 1488, in _extract_f4m_formats
    fatal=fatal, data=data, headers=headers, query=query)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/extractor/common.py", line 842, in _download_xml
    expected_status=expected_status)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/extractor/common.py", line 820, in _download_xml_handle
    expected_status=expected_status)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/extractor/common.py", line 660, in _download_webpage_handle
    urlh = self._request_webpage(url_or_request, video_id, note, errnote, fatal, data=data, headers=headers, query=query, expected_status=expected_status)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/extractor/common.py", line 627, in _request_webpage
    return self._downloader.urlopen(url_or_request)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/YoutubeDL.py", line 2238, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/usr/lib64/python3.6/urllib/request.py", line 526, in open
    response = self._open(req, data)
  File "/usr/lib64/python3.6/urllib/request.py", line 544, in _open
    '_open', req)
  File "/usr/lib64/python3.6/urllib/request.py", line 504, in _call_chain
    result = func(*args)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/utils.py", line 2736, in https_open
    req, **kwargs)
  File "/usr/lib64/python3.6/urllib/request.py", line 1349, in do_open
    encode_chunked=req.has_header('Transfer-encoding'))
  File "/usr/lib64/python3.6/http/client.py", line 1287, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/usr/lib64/python3.6/http/client.py", line 1333, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/usr/lib64/python3.6/http/client.py", line 1282, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/lib64/python3.6/http/client.py", line 1042, in _send_output
    self.send(msg)
  File "/usr/lib64/python3.6/http/client.py", line 980, in send
    self.connect()
  File "/usr/lib64/python3.6/http/client.py", line 1448, in connect
    server_hostname=server_hostname)
  File "/usr/lib64/python3.6/ssl.py", line 407, in wrap_socket
    _context=self, _session=session)
  File "/usr/lib64/python3.6/ssl.py", line 817, in __init__
    self.do_handshake()
  File "/usr/lib64/python3.6/ssl.py", line 1077, in do_handshake
    self._sslobj.do_handshake()
  File "/usr/lib64/python3.6/ssl.py", line 694, in do_handshake
    match_hostname(self.getpeercert(), self.server_hostname)
  File "/usr/lib64/python3.6/ssl.py", line 327, in match_hostname
    % (hostname, ', '.join(map(repr, dnsnames))))
ssl.CertificateError: hostname 'hds.video-cdn.espn.com' doesn't match either of 'a248.e.akamai.net', '*.akamaized.net', '*.akamaihd-staging.net', '*.akamaihd.net', '*.akamaized-staging.net'

Description

Works with python 3.7 (I spent several hours testing this by upgrading to python 3.7, verifying that the URL downloads, and then re-installing youtube-dl with only python 3.6). I have reinstalled youtube-dl (for about the tenth time today) with python 3.7, and the URL downloads with no problems.

$ youtube-dl -f best -v 'https://www.espn.com/nba/story/_/id/29895442/nba-players-show-no-mercy-twitter-clippers-nuggets-game-7-shocker'
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--restrict-filenames', '-o', '%(title)s-%(id)s-%(uploader)s.%(ext)s', '-w', '-f', 'best', '-v', 'https://www.espn.com/nba/story/_/id/29895442/nba-players-show-no-mercy-twitter-clippers-nuggets-game-7-shocker']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.09.14
[debug] Python version 3.7.8 (CPython) - Linux-4.4.221-gentoo-x86_64-Intel-R-_Core-TM-_i5_CPU_750_@_2.67GHz-with-gentoo-2.4.1
[debug] exe versions: ffmpeg 3.4.6, ffprobe 3.4.6, rtmpdump 2.4
[debug] Proxy map: {}
[ESPNArticle] nba-players-show-no-mercy-twitter-clippers-nuggets-game-7-shocker: Downloading webpage
[ESPN] 29895463: Downloading JSON metadata
[ESPN] 29895463: Downloading SMIL file
[ESPN] 29895463: Downloading f4m manifest
WARNING: Unable to download f4m manifest: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: Hostname mismatch, certificate is not valid for 'hds.video-cdn.espn.com'. (_ssl.c:1091)>
[ESPN] 29895463: Downloading m3u8 information
[debug] Invoking downloader on 'https://media.video-origin.espn.com/espnvideo/2020/0915/dm_200915_nba_sas_on_nuggets/dm_200915_nba_sas_on_nuggets.mp4'
[download] Destination: Stephen_A._stunned_by_Nuggets_Game_7_win-29895463-NA.mp4
[download] 100% of 138.66MiB in 00:05