Error 403 on authenticated/login Nico download attempt

[nintendraw]

Checklist

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2021.04.01
• 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 bug reports including closed ones
• I've read bugs section in FAQ

Verbose log

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['https://www.nicovideo.jp/watch/sm25568520', '-u', 'PRIVATE', '-p', 'PRIVATE', '-v']
[debug] Encodings: locale cp932, fs mbcs, out cp932, pref cp932
[debug] youtube-dl version 2021.04.01
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.19041
[debug] exe versions: none
[debug] Proxy map: {}
[niconico] Logging in
[niconico] sm25568520: Downloading webpage
[niconico] sm25568520: Downloading flv info
[niconico] sm25568520: Downloading video info page
[debug] Default format spec: best/bestvideo+bestaudio
[debug] Invoking downloader on 'http://smile-cow11.nicovideo.jp/smile?m=25568520.98319low'
ERROR: unable to download video data: HTTP Error 403: Forbidden
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpwt56m8wg\build\youtube_dl\YoutubeDL.py", line 1967, in process_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpwt56m8wg\build\youtube_dl\YoutubeDL.py", line 1906, in dl
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpwt56m8wg\build\youtube_dl\downloader\common.py", line 366, in download
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpwt56m8wg\build\youtube_dl\downloader\http.py", line 351, in real_download
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpwt56m8wg\build\youtube_dl\downloader\http.py", line 116, in establish_connection
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpwt56m8wg\build\youtube_dl\downloader\http.py", line 110, in establish_connection
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpwt56m8wg\build\youtube_dl\YoutubeDL.py", line 2279, 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 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
urllib.error.HTTPError: HTTP Error 403: Forbidden

Description

After updating from like a Nov 2020 version, I tried downloading the Nico video included in the log and initially got an error that Nico requires login now. Once I fixed that (using my email username rather than my ID number; Idk if that's supposed to happen), I got a 403 error instead. Not sure what's going on. Am I overlooking something? Thanks!

[shaunmcdade]

I had this same problem. I eventually realized I had followed the instructions from the main page, READEME.md, which installed the python script for the main youtube-dl, not this fork. Following the instructions here, to pip install this fork, got it working for me.

I hope that's it for you too!

[Doctor-Ray]

I'm running into what SEEMS to be the same problem in Win10, even after updating both youtube-dl and python... does this log suggest what I might be doing worng?

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-vv', '-u', 'PRIVATE', '-p', 'PRIVATE', 'https://www.nicovideo.jp/watch/sm7454786']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2021.05.16
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.19041
[debug] exe versions: none
[debug] Proxy map: {}
[niconico] Logging in
[niconico] sm7454786: Downloading webpage
[niconico] sm7454786: Downloading flv info
[niconico] sm7454786: Downloading video info page
[debug] Default format spec: best/bestvideo+bestaudio
[debug] Invoking downloader on 'http://smile-ccm31.nicovideo.jp/smile?m=7454786.51761'
ERROR: unable to download video data: HTTP Error 403: Forbidden
Traceback (most recent call last):
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp8rlhijs0\build\youtube_dl\YoutubeDL.py", line 1976, in process_info
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp8rlhijs0\build\youtube_dl\YoutubeDL.py", line 1915, in dl
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp8rlhijs0\build\youtube_dl\downloader\common.py", line 366, in download
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp8rlhijs0\build\youtube_dl\downloader\http.py", line 351, in real_download
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp8rlhijs0\build\youtube_dl\downloader\http.py", line 116, in establish_connection
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp8rlhijs0\build\youtube_dl\downloader\http.py", line 110, in establish_connection
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp8rlhijs0\build\youtube_dl\YoutubeDL.py", line 2288, 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 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
urllib.error.HTTPError: HTTP Error 403: Forbidden