America's Test Kitchen was working last week, now failing with JSON error

[sjthespian]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2020.01.15
• 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 --verbose https://www.americastestkitchen.com/episode/649-pork-and-potatoes
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', 'https://www.americastestkitchen.com/episode/649-pork-and-potatoes']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.01.15
[debug] Python version 3.7.2 (CPython) - Darwin-18.7.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 4.1, ffprobe 4.1
[debug] Proxy map: {}
[AmericasTestKitchen] 649: Downloading webpage
ERROR: 649: Failed to parse JSON  (caused by JSONDecodeError('Expecting value: line 1 column 43 (char 42)')); 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 "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 899, in _parse_json
    return json.loads(json_string)
  File "/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/__init__.py", line 348, in loads
    return _default_decoder.decode(s)
  File "/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 43 (char 42)
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 899, in _parse_json
    return json.loads(json_string)
  File "/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/__init__.py", line 348, in loads
    return _default_decoder.decode(s)
  File "/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/local/Cellar/python/3.7.2_2/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 43 (char 42)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 796, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/americastestkitchen.py", line 50, in _real_extract
    video_id)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 903, in _parse_json
    raise ExtractorError(errmsg, cause=ve)
youtube_dl.utils.ExtractorError: 649: Failed to parse JSON  (caused by JSONDecodeError('Expecting value: line 1 column 43 (char 42)')); 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

Downloads from America's Test Kitchen have been working fine for me, but in trying to download this week's episode I'm getting the JSON error above. It appears that this is due to a change in the site, as even last week's episode now fails to download.

I've been digging through the page HTML and I'm not sure what is causing the failure. I don't see any obvious bad JSON, so I'm assuming this is in the sub-page that contains the actual video.

[sjthespian]

Crud, why didn't #23787 show up when I was searching earlier this morning! Sorry about the dup.