[NATGEO] Error Unsupported URL

[dnlzzxz]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2019.11.28
• 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 --add-metadata https://www.nationalgeographic.com/tv/shows/running-wild-with-bear-grylls/episode-guide/season-05/episode-01-brie-larson-in-the-pearl-islands/vdka13932991 --console-title --geo-verification-proxy http://127.0.0.1:9750 -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--add-metadata', 'https://www.nationalgeographic.com/tv/shows/running-wild-with-bear-grylls/episode-guide/season-05/episode-01-brie-larson-in-the-pearl-islands/vdka13932991', '--console-title', '--geo-verification-proxy', 'http://127.0.0.1:9750', '-v']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2019.11.28
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.18362
[debug] exe versions: ffmpeg 4.2.1, ffprobe 4.2.1
[debug] Proxy map: {}
[generic] vdka13932991: Requesting header
WARNING: Falling back on generic information extractor.
[generic] vdka13932991: Downloading webpage
[generic] vdka13932991: Extracting information
ERROR: Unsupported URL: https://www.nationalgeographic.com/tv/shows/running-wild-with-bear-grylls/episode-guide/season-05/episode-01-brie-larson-in-the-pearl-islands/vdka13932991
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpwy0zjfmc\build\youtube_dl\YoutubeDL.py", line 796, in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpwy0zjfmc\build\youtube_dl\extractor\common.py", line 530, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpwy0zjfmc\build\youtube_dl\extractor\generic.py", line 3347, in _real_extract
youtube_dl.utils.UnsupportedError: Unsupported URL: https://www.nationalgeographic.com/tv/shows/running-wild-with-bear-grylls/episode-guide/season-05/episode-01-brie-larson-in-the-pearl-islands/vdka13932991

Description

Natgeo's URLs are 'Falling back to generic extractor' then accusing 'Unsupported URL'.

Thanks for the amazing effort put in youtube-dl!