O'reilly safari 404 while downloading a course which plays fine in Chrome.

[adityakaushik0609]

Checklist

• [x ] I'm reporting a broken site support
• [x ] I've verified that I'm running youtube-dl version 2019.06.21
• [x ] I've checked that all provided URLs are alive and playable in a browser
• [x ] I've checked that all URLs and arguments with special characters are properly quoted or escaped
• [x ] I've searched the bugtracker for similar issues including closed ones

Verbose log

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', '-u', 'PRIVATE', '-p', 'PRIVATE', 'http
s://learning.oreilly.com/videos/python-fundamentals']
[debug] Encodings: locale cp1252, fs mbcs, out cp1252, pref cp1252
[debug] youtube-dl version 2019.06.21
[debug] Python version 3.4.4 (CPython) - Windows-7-6.1.7601-SP1
[debug] exe versions: none
[debug] Proxy map: {}
WARNING: Could not send HEAD request to https://learning.oreilly.com/videos/pyth
on-fundamentals: HTTP Error 404: Not Found
ERROR: Unable to download webpage: HTTP Error 404: Not Found (caused by HTTPErro
r()); please report this issue on https://yt-dl.org/bug . Make sure you are usin
g 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 "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmppgbwk_
g4\build\youtube_dl\extractor\common.py", line 627, in _request_webpage
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmppgbwk_
g4\build\youtube_dl\YoutubeDL.py", line 2227, in urlopen
  File "C:\Python\Python34\lib\urllib\request.py", line 470, in open
  File "C:\Python\Python34\lib\urllib\request.py", line 580, in http_response
  File "C:\Python\Python34\lib\urllib\request.py", line 502, in error
  File "C:\Python\Python34\lib\urllib\request.py", line 442, in _call_chain
  File "C:\Python\Python34\lib\urllib\request.py", line 685, in http_error_302
  File "C:\Python\Python34\lib\urllib\request.py", line 470, in open
  File "C:\Python\Python34\lib\urllib\request.py", line 580, in http_response
  File "C:\Python\Python34\lib\urllib\request.py", line 508, in error
  File "C:\Python\Python34\lib\urllib\request.py", line 442, in _call_chain
  File "C:\Python\Python34\lib\urllib\request.py", line 588, in http_error_default```


## Description

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I was trying to download a video course from o'reilly safari, and I could play the same on my browser. But trying to download it resulted in a 404 error.

[dstftw]

HTTP Error 404: Not Found