[youtube] unable to download 18+ videos

[Nekun]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2020.07.28
• 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

Verbose log

[debug] System config: []
[debug] User config: ['-f', 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/bestvideo[ext=webm]+bestaudio[ext=webm]/best[ext=webm]/best']
[debug] Custom config: []
[debug] Command-line args: ['--verbose', '--proxy', 'socks5://192.168.100.130:6666', 'https://www.youtube.com/watch?v=07FYdnEawAQ']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.07.28
[debug] Python version 3.7.8 (CPython) - Linux-5.4.48-gentoo-x86_64-Intel-R-_Core-TM-_i5-9500_CPU_@_3.00GHz-with-gentoo-2.6
[debug] exe versions: ffmpeg 4.2.4, ffprobe 4.2.4, rtmpdump 2.4
[debug] Proxy map: {'http': 'socks5://192.168.100.130:6666', 'https': 'socks5://192.168.100.130:6666'}
[youtube] 07FYdnEawAQ: Downloading webpage
ERROR: 07FYdnEawAQ: YouTube said: Unable to extract video data
Traceback (most recent call last):
  File "/usr/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 797, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/usr/lib/python3.7/site-packages/youtube_dl/extractor/youtube.py", line 1893, in _real_extract
    'YouTube said: %s' % unavailable_message, expected=True, video_id=video_id)
youtube_dl.utils.ExtractorError: 07FYdnEawAQ: YouTube said: Unable to extract video data

Description

Youtube-dl fails with "Unable to extract video data" when attempts to download video from youtube with age restrictions.