"Failed to parse JSON" while downloading from https://www.raiplay.it

[paolobormida]

Checklist

• I'm reporting a broken site support issue
• I've verified that I'm running youtube-dl version 2020.01.01
• 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

youtube-dl.exe --verbose https://www.raiplay.it/video/2019/12/Benvenuto-Presidente-0f0a1989-7a3a-4ee5-9fd4-706a3ba46f8e.html
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', 'https://www.raiplay.it/video/2019/12/Benvenuto-Presidente-0f0a1989-7a3a-4ee5-9fd4-706a3ba46f8e.html']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2020.01.01
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.18362
[debug] exe versions: ffmpeg 3.4, ffprobe 3.3.3
[debug] Proxy map: {}
[RaiPlay] 0f0a1989-7a3a-4ee5-9fd4-706a3ba46f8e: Downloading video JSON
ERROR: 0f0a1989-7a3a-4ee5-9fd4-706a3ba46f8e: Failed to parse JSON  (caused by ValueError('Expecting value: line 1 column 1 (char 0)',)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpj4acy7ln\build\youtube_dl\extractor\common.py", line 899, in _parse_json
  File "C:\Python\Python34\lib\json\__init__.py", line 318, in loads
  File "C:\Python\Python34\lib\json\decoder.py", line 343, in decode
  File "C:\Python\Python34\lib\json\decoder.py", line 361, in raw_decode
ValueError: Expecting value: line 1 column 1 (char 0)
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpj4acy7ln\build\youtube_dl\extractor\common.py", line 899, in _parse_json
  File "C:\Python\Python34\lib\json\__init__.py", line 318, in loads
  File "C:\Python\Python34\lib\json\decoder.py", line 343, in decode
  File "C:\Python\Python34\lib\json\decoder.py", line 361, in raw_decode
ValueError: Expecting value: line 1 column 1 (char 0)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpj4acy7ln\build\youtube_dl\YoutubeDL.py", line 796, in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpj4acy7ln\build\youtube_dl\extractor\common.py", line 530, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpj4acy7ln\build\youtube_dl\extractor\rai.py", line 174, in _real_extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpj4acy7ln\build\youtube_dl\extractor\common.py", line 892, in _download_json
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpj4acy7ln\build\youtube_dl\extractor\common.py", line 876, in _download_json_handle
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpj4acy7ln\build\youtube_dl\extractor\common.py", line 903, in _parse_json
youtube_dl.utils.ExtractorError: 0f0a1989-7a3a-4ee5-9fd4-706a3ba46f8e: Failed to parse JSON  (caused by ValueError('Expecting value: line 1 column 1 (char 0)',)); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

Description

Trying to download video from https://www.raiplay.it/ JSON parsing fails. Website requires registration and authentication, but adding -u and -p options does not change the outcome of the youtube-dl invocation.