theoplayer embeds: “Unsupported URL“

[SillyScribe95]

Checklist

• I’m reporting a broken site support issue
• I’ve verified that I’m running youtube-dl version 2019.10.22
• 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] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-i', '-v', '--no-check-certificate', '--skip-download', '--write-info-json', 'https://sthelens.public-i.tv/core/portal/webcast_interactive/439379']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.08.02
[debug] Python version 3.7.3 (CPython) - Darwin-18.7.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 4.1.4, ffprobe 4.1.4, rtmpdump 2.4
[debug] Proxy map: {}
[generic] 439379: Requesting header
WARNING: Falling back on generic information extractor.
[generic] 439379: Downloading webpage
[generic] 439379: Extracting information
[generic] 439379: Requesting header
WARNING: Falling back on generic information extractor.
[generic] 439379: Downloading webpage
[generic] 439379: Extracting information
ERROR: Unsupported URL: https://sthelens.public-i.tv/core/iframe/justwidget/560/jsw/1/activity_id/439379/
Traceback (most recent call last):
  File "/miniconda3/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 796, in extract_info
    ie_result = ie.extract(url)
  File "/miniconda3/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/miniconda3/lib/python3.7/site-packages/youtube_dl/extractor/generic.py", line 3333, in _real_extract
    raise UnsupportedError(url)
youtube_dl.utils.UnsupportedError: Unsupported URL: https://sthelens.public-i.tv/core/iframe/justwidget/560/jsw/1/activity_id/439379/

Description

WRITE DESCRIPTION HERE

Even if THEOplayer’s not listed as one of the supported sites, should --write-info-json be able to extract information from its iframe formatting without downloading the content? I tried using ffprobe and that didn’t work either, thoughts appreciated.