vk.com video: AttributeError: 'list' object has no attribute 'startswith'

[l29ah]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2019.11.05
• 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

‰ youtube-dl -v 'https://vk.com/wall374723332_54367' 
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-n', '-c', '-v', 'https://vk.com/wall374723332_54367']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.11.05
[debug] Python version 3.6.9 (CPython) - Linux-5.3.11+-x86_64-with-glibc2.4
[debug] exe versions: ffmpeg 4.2.1, ffprobe 4.2.1, rtmpdump 2.4
[debug] Proxy map: {}
[vk:wallpost] Downloading login page
[vk:wallpost] Logging in
[vk:wallpost] 374723332_54367: Downloading JSON metadata
[download] Downloading playlist: Ватоадмин Ватоадмин - Wall post 374723332_54367
[vk:wallpost] playlist Ватоадмин Ватоадмин - Wall post 374723332_54367: Collected 9 video ids (downloading 9 of them)
[download] Downloading video 1 of 9
Traceback (most recent call last):
  File "/usr/lib/python-exec/python3.6/youtube-dl", line 11, in <module>
    load_entry_point('youtube-dl==2019.11.5', 'console_scripts', 'youtube-dl')()
  File "/usr/lib64/python3.6/site-packages/youtube_dl/__init__.py", line 474, in main
    _real_main(argv)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/__init__.py", line 464, in _real_main
    retcode = ydl.download(all_urls)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/YoutubeDL.py", line 2018, in download
    url, force_generic_extractor=self.params.get('force_generic_extractor', False))
  File "/usr/lib64/python3.6/site-packages/youtube_dl/YoutubeDL.py", line 807, in extract_info
    return self.process_ie_result(ie_result, download, extra_info)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/YoutubeDL.py", line 1007, in process_ie_result
    extra_info=extra)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/YoutubeDL.py", line 862, in process_ie_result
    return self.process_video_result(ie_result, download=download)
  File "/usr/lib64/python3.6/site-packages/youtube_dl/YoutubeDL.py", line 1459, in process_video_result
    t['url'] = sanitize_url(t['url'])
  File "/usr/lib64/python3.6/site-packages/youtube_dl/utils.py", line 2129, in sanitize_url
    if url.startswith('//'):
AttributeError: 'list' object has no attribute 'startswith'

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