[Udemy] Unable to download JSON metadata: HTTP Error 403: Forbidden

[cptflammin]

• [ x ] I've verified and I assure that I'm running youtube-dl 2018.05.01

Before submitting an issue make sure you have:

• [ x ] At least skimmed through the README, most notably the FAQ and BUGS sections
• [ x ] Searched the bugtracker for similar issues including closed ones
• [ x ] Checked that provided video/audio/playlist URLs (if any) are alive and playable in a browser

What is the purpose of your issue?

• [ x ] Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

youtube-dl -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.05.01
[debug] Python version 2.7.15 (CPython) - Darwin-17.5.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 4.0, ffprobe 4.0
[debug] Proxy map: {}
...
<end of log>

Get 403 on free and paid lessons. Cannot provide account credentials but can be reproduced with any free lesson.

youtube-dl --cookies ./udemy-cookies.txt -o '%(playlist)s/%(chapter_number)s - %(chapter)s/%(playlist_index)s. %(title)s.%(ext)s' https://www.udemy.com/javascript-essentials/learn/v4

[udemy:course] javascript-essentials: Downloading webpage
[udemy:course] 707962: Enrolling in the course
[udemy:course] 707962: Downloading course curriculum
ERROR: Unable to download JSON metadata: 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.

Same error as reported here and there end of page, something may have changed in Udemy (new protection?) as full course download was working perfectly until now. Note: I experimented same issues user comments before upgrade (error : "ERROR : No video formats found") and after upgrade to latest getting HTTP Error 403: Forbidden)

[enbima]

Same problem here, cannot download some courses anymore with 403 Forbidden Error (they are paid and credentials are given). This suddenly happens for courses where the coach doesn't allow the manual download of a lecture. Courses where the manual download of a video is supported still works fine with youtube-dl.