PBS Frontline is broken

[dspraus]

Checklist

• [x ] I'm reporting a broken site support
• [x ] I've verified that I'm running youtube-dl version 2020.05.29
• [x ] I've checked that all provided URLs are alive and playable in a browser
• [x ] I've checked that all URLs and arguments with special characters are properly quoted or escaped
• [x ] I've searched the bugtracker for similar issues including closed ones

Verbose log

youtube-dl --verbose https://www.pbs.org/wgbh/frontline/film/inside-italys-covid-war/
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', 'https://www.pbs.org/wgbh/frontline/film/inside-italys-covid-war/']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2020.05.29
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.18362
[debug] exe versions: ffmpeg git-2020-02-13-6d37ca8
[debug] Proxy map: {}
[debug] Using fake IP 6.255.102.220 (US) as X-Forwarded-For.
[pbs] Downloading JSON metadata
[pbs] inside-italys-covid-war: Downloading webpage
[pbs] inside-italys-covid-war: Downloading widget/partnerplayer page
[pbs] inside-italys-covid-war: Downloading portalplayer page
ERROR: No video formats found; 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\tmpxtvjzx45\build\youtube_dl\YoutubeDL.py", line 797, in extract_info
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpxtvjzx45\build\youtube_dl\extractor\common.py", line 530, in extract
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpxtvjzx45\build\youtube_dl\extractor\pbs.py", line 661, in _real_extract
File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpxtvjzx45\build\youtube_dl\extractor\common.py", line 1350, in _sort_formats
youtube_dl.utils.ExtractorError: No video formats found; 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

I was previously able to download films from PBS Frontline using regular page URL - eg. https://www.pbs.org/wgbh/frontline/film/inside-italys-covid-war/