[8tracks] playlist download fails with `ERROR: Failed to download song information: HTTP Error 403: Forbidden (caused by HTTPError())`

[plambros]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2020.03.01
• 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 issues including closed ones. Please note: There are some seemingly similar issues from 5 years ago, but whatever was the cause of those was fixed in the meantime, so this is a new kind of occurrence.

Verbose log

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'https://8tracks.com/shockslogans/i-like-short-songs']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.03.01
[debug] Python version 2.7.16 (CPython) - Linux-4.19.0-8-amd64-x86_64-with-debian-10.3
[debug] exe versions: ffmpeg 4.1.4-1, ffprobe 4.1.4-1
[debug] Proxy map: {}
[8tracks] i-like-short-songs: Downloading webpage
[8tracks] i-like-short-songs: Downloading song information 1/22
[8tracks] i-like-short-songs: Waiting for 34.9090909091 seconds
[8tracks] i-like-short-songs: Downloading song information 1/22
[8tracks] i-like-short-songs: Waiting for 34.9090909091 seconds
[8tracks] i-like-short-songs: Downloading song information 1/22
[8tracks] i-like-short-songs: Waiting for 34.9090909091 seconds
[8tracks] i-like-short-songs: Downloading song information 1/22
[8tracks] i-like-short-songs: Waiting for 34.9090909091 seconds
[8tracks] i-like-short-songs: Downloading song information 1/22
ERROR: Failed to download song information: HTTP Error 403: Forbidden (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

This occurs when attempting to download any playlist.

Since we're waiting for a duration equal to the average song length between retries, this would be faster to reproduce with a playlist like this: https://8tracks.com/shockslogans/i-like-short-songs

It happens with alphanumeric names too, as in https://8tracks.com/goffie/6736655