[facebook] There is a problem when using the URL of post with YoutubeDL() extractor

[GetPHP-IR]

Checklist

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2020.06.06
• 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] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.06.06
[debug] Python version 3.7.7 (CPython) - Linux-4.15.0-101-generic-x86_64-with-Ubuntu-18.04-bionic
[debug] exe versions: ffmpeg 3.4.6, ffprobe 3.4.6
[debug] Proxy map: {'http': 'https://*******', 'https': 'https://******'}
[facebook] 164667721736752: Downloading webpage
ERROR: 164667721736752: Failed to parse JSON  (caused by JSONDecodeError("Expecting ',' delimiter: line 1 column 21 (char 20)")); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/***/***/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 899, in _parse_json
    return json.loads(json_string)
  File "/usr/lib/python3.7/json/__init__.py", line 348, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python3.7/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python3.7/json/decoder.py", line 353, in raw_decode
    obj, end = self.scan_once(s, idx)
json.decoder.JSONDecodeError: Expecting ',' delimiter: line 1 column 21 (char 20)
Traceback (most recent call last):
  File "/*****/****/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 899, in _parse_json
    return json.loads(json_string)
  File "/usr/lib/python3.7/json/__init__.py", line 348, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python3.7/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python3.7/json/decoder.py", line 353, in raw_decode
    obj, end = self.scan_once(s, idx)
json.decoder.JSONDecodeError: Expecting ',' delimiter: line 1 column 21 (char 20)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/*****/*****/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 797, in extract_info
    ie_result = ie.extract(url)
  File "/*****/*****/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/*****/*****/lib/python3.7/site-packages/youtube_dl/extractor/facebook.py", line 475, in _real_extract
    video_id)]
  File "/*****/*****/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 903, in _parse_json
    raise ExtractorError(errmsg, cause=ve)
youtube_dl.utils.ExtractorError: 164667721736752: Failed to parse JSON  (caused by JSONDecodeError("Expecting ',' delimiter: line 1 column 21 (char 20)")); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

Description

Hi
When i use youtube-dl embed code method to download the video (like this url) "https://www.facebook.com/105776530959205/posts/164667721736752/" in info extractor this error occurred

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
            info_dict = ydl.extract_info(url, download=False)    

There is no problem with FB video URLs (like this one): "https://www.facebook.com/imdb/videos/241414897068881/"