Unable to download login form for Lynda.com using 2018.11.07 version

[BigData101ex]

Please follow the guide below

• You will be asked some questions and requested to provide some information, please read them carefully and answer honestly
• Put an x into all the boxes [ ] relevant to your issue (like this: [x])
• Use the Preview tab to see what your issue will actually look like

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.11.07. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• [ x] I've verified and I assure that I'm running youtube-dl 2018.11.07

Before submitting an issue make sure you have:

• At least skimmed through the README, most notably the FAQ and BUGS sections
• [x ] Searched the bugtracker for similar issues including closed ones
• 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

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The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your issue

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add the -v flag to your command line you run youtube-dl with (youtube-dl -v <your command line>), copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

C:\Users\bannu\Downloads>youtube-dl.exe --proxy http://web-proxy.in.com:8088 https://www.lynda.com/Python-tutorials/NLP-Python-Machine-Learning-Essential-Training/622075-2.html -u xxxx -p xxxx --no-overwrites --continue --write-description --cookies C:\Users\bannu\Documents\Lynda\cookies.txt  --all-subs -o C:\Users\bannu\Documents\Lynda\Lynda\%(playlist)s\%(chapter)s\%(display_id)s-%(title)s.%(ext)s --verbose
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--proxy', 'http://web-proxy.in.com:8088', 'https://www.lynda.com/Python-tutorials/NLP-Python-Machine-Learning-Essential-Training/622075-2.html', '-u', 'PRIVATE', '-p', 'PRIVATE', '--no-overwrites', '--continue', '--write-description', '--cookies', 'C:\\Users\\bannu\\Documents\\Lynda\\cookies.txt', '--all-subs', '-o', 'C:\\Users\\bannu\\Documents\\Lynda\\Lynda\\%(playlist)s\\%(chapter)s\\%(display_id)s-%(title)s.%(ext)s', '--verbose']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2018.11.07
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.16299
[debug] exe versions: none
[debug] Proxy map: {'http': 'http://web-proxy.in.com:8088', 'https': 'http://web-proxy.in.com:8088'}
[lynda:course] Downloading signin page
ERROR: Unable to extract signin form; 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.
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpj6iiia1g\build\youtube_dl\YoutubeDL.py", line 792, in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpj6iiia1g\build\youtube_dl\extractor\common.py", line 507, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpj6iiia1g\build\youtube_dl\extractor\common.py", line 411, in initialize
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpj6iiia1g\build\youtube_dl\extractor\lynda.py", line 25, in _real_initialize
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpj6iiia1g\build\youtube_dl\extractor\lynda.py", line 75, in _login
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpj6iiia1g\build\youtube_dl\extractor\common.py", line 983, in _search_regex
youtube_dl.utils.RegexNotFoundError: Unable to extract signin form; 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.
...
<end of log>

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If the purpose of this issue is a site support request please provide all kinds of example URLs support for which should be included (replace following example URLs by yours):

• Single video: https://www.youtube.com/watch?v=BaW_jenozKc
• Single video: https://youtu.be/BaW_jenozKc
• Playlist: https://www.youtube.com/playlist?list=PL4lCao7KL_QFVb7Iudeipvc2BCavECqzc

Note that youtube-dl does not support sites dedicated to copyright infringement. In order for site support request to be accepted all provided example URLs should not violate any copyrights.

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Description of your issue, suggested solution and other information

Explanation of your issue in arbitrary form goes here. Please make sure the description is worded well enough to be understood. Provide as much context and examples as possible.
If work on your issue requires account credentials please provide them or explain how one can obtain them.

[namaljayathunga]

youtube-dl -u USERNAME -p PASSWARD -o "%(playlist)s/%(chapter_number)s-%(chapter)s/%(playlist_index)s-%(title)s.%(ext)s" -f 1-720 http://www.lynda.com/course-tutorials/BIM-Management-Techniques-Managing-People-Processes/674585-2.html -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-u', 'PRIVATE', '-p', 'PRIVATE', '-o', '%(playlist)s/%(chapter_number)s-%(chapter)s/%(playlist_index)s-%(title)s.%(ext)s', '-f', '1-720', 'http://www.lynda.com/course-tutorials/BIM-Management-Techniques-Managing-People-Processes/674585-2.html', '-v']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2018.11.07
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.17134
[debug] exe versions: ffmpeg N-91211-g5ee203076f, ffprobe N-91211-g5ee203076f
[debug] Proxy map: {}
[lynda:course] Downloading signin page
ERROR: Unable to extract signin form; 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.
Traceback (most recent call last):
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpj6iiia1g\build\youtube_dl\YoutubeDL.py", line 792, in extract_info
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpj6iiia1g\build\youtube_dl\extractor\common.py", line 507, in extract
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpj6iiia1g\build\youtube_dl\extractor\common.py", line 411, in initialize
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpj6iiia1g\build\youtube_dl\extractor\lynda.py", line 25, in _real_initialize
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpj6iiia1g\build\youtube_dl\extractor\lynda.py", line 75, in _login
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpj6iiia1g\build\youtube_dl\extractor\common.py", line 983, in _search_regex
youtube_dl.utils.RegexNotFoundError: Unable to extract signin form; 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.

[BigData101ex]

Yes looks like the login elements on Lynda.com have changed and hence the youtube-dl latest version is unable to parse the webpage. Atleast till the last month, I was able to download videos from Lynda.

[BigData101ex]

How do we submit this issue to the developers?