youtube-dl: [YouTube] Age verification issues - Can't download video.

Checklist

• I’m reporting a broken site support
• I’ve verified that I’m running youtube-dl version 2021.03.25
• 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 (i found one similar but my --cookies are not expired as stated in this issue #28468)

Verbose log

youtube-dl --verbose https://www.youtube.com/watch?v=rR8s72aouNE
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', 'https://www.youtube.com/watch?v=rR8s72aouNE']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2021.03.25
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.19041
[debug] exe versions: ffmpeg 2021-03-28-git-8b2bde0494-full_build, ffprobe 2021-03-28-git-8b2bde0494-full_build
[debug] Proxy map: {}
[youtube] rR8s72aouNE: Downloading webpage
[youtube] rR8s72aouNE: Refetching age-gated info webpage
ERROR: Sign in to confirm your age
This video may be inappropriate for some users.
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp5nc448kk\build\youtube_dl\YoutubeDL.py", line 806, in wrapper
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp5nc448kk\build\youtube_dl\YoutubeDL.py", line 827, in __extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp5nc448kk\build\youtube_dl\extractor\common.py", line 534, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp5nc448kk\build\youtube_dl\extractor\youtube.py", line 1658, in _real_extract
youtube_dl.utils.ExtractorError: Sign in to confirm your age
This video may be inappropriate for some users.

Description

• Hello

• I tried to download an age-gated video and i got some age-verification errors as you can see in the Verbose log above.
  

• When i tried to provide the --cookies then i got the error below:

youtube-dl --verbose --cookies C:/Users/account/Desktop/cookies.txt https://www.youtube.com/watch?v=rR8s72aouNE
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', '--cookies', 'C:/Users/account/Desktop/cookies.txt', 'https://www.youtube.com/watch?v=rR8s72aouNE']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2021.03.25
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.19041
[debug] exe versions: ffmpeg 2021-03-28-git-8b2bde0494-full_build, ffprobe 2021-03-28-git-8b2bde0494-full_build
[debug] Proxy map: {}
[youtube] rR8s72aouNE: Downloading webpage
ERROR: Verify your age
Complete a brief check to show you're old enough to watch this video. Learn more
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp5nc448kk\build\youtube_dl\YoutubeDL.py", line 806, in wrapper
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp5nc448kk\build\youtube_dl\YoutubeDL.py", line 827, in __extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp5nc448kk\build\youtube_dl\extractor\common.py", line 534, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmp5nc448kk\build\youtube_dl\extractor\youtube.py", line 1658, in _real_extract
youtube_dl.utils.ExtractorError: Verify your age
Complete a brief check to show you're old enough to watch this video. Learn more

• I’m signed in to my account and i verified that the --cookies are not expired. and of course my date of birth is over 18 years.

• I know that there is an age-restriction in the EU region, but i also can’t download using just the normal command as with all other age-gated videos.

• What gives?