NDR.de not working

[bjoseru]

This is related to site-support-request #2325, which added NDR.de, but now it is broken again.

Sample output below:

$youtube-dl -U
youtube-dl is up-to-date (2020.03.08)
$youtube-dl --verbose -c 'https://www.ndr.de/fernsehen/sendungen/die-ernaehrungsdocs/Wie-Zuckerverzicht-bei-Depression-hilft,ernaehrungsdocs574.html'
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', '-c', 'https://www.ndr.de/fernsehen/sendungen/die-ernaehrungsdocs/Wie-Zuckerverzicht-bei-Depression-hilft,ernaehrungsdocs574.html']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.03.08
[debug] Python version 3.7.3 (CPython) - Darwin-18.7.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 4.2.1, ffprobe 4.2.1
[debug] Proxy map: {}
[ndr] Wie-Zuckerverzicht-bei-Depression-hilft: Downloading webpage
ERROR: Unable to extract embed URL; 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 "/Users/bjorn/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 797, in extract_info
    ie_result = ie.extract(url)
  File "/Users/bjorn/bin/youtube-dl/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/Users/bjorn/bin/youtube-dl/youtube_dl/extractor/ndr.py", line 22, in _real_extract
    return self._extract_embed(webpage, display_id)
  File "/Users/bjorn/bin/youtube-dl/youtube_dl/extractor/ndr.py", line 90, in _extract_embed
    'embedURL', webpage, 'embed URL', fatal=True)
  File "/Users/bjorn/bin/youtube-dl/youtube_dl/extractor/common.py", line 1135, in _html_search_meta
    html, display_name, fatal=fatal, group='content', **kwargs)
  File "/Users/bjorn/bin/youtube-dl/youtube_dl/extractor/common.py", line 1014, in _html_search_regex
    res = self._search_regex(pattern, string, name, default, fatal, flags, group)
  File "/Users/bjorn/bin/youtube-dl/youtube_dl/extractor/common.py", line 1005, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
youtube_dl.utils.RegexNotFoundError: Unable to extract embed URL; 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.