ndr extractor: "WARNING: unable to extract description"

[z1atk0]

When I try to download something from NDR , I get "WARNING: unable to extract description; 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.". The download itself works fine, though. I'm using 2015.12.10 on one PC and 2015.12.13 on another, same warning with both versions.

So, as requested, here we go:

zlatko@ironman:~/tmp$ ./youtube-dl -F --verbose "http://www.ndr.de/fernsehen/sendungen/der_tatortreiniger/Der-Tatortreiniger-Bestattungsvorsorge,sendung454132.html"
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'-F', u'--verbose', u'http://www.ndr.de/fernsehen/sendungen/der_tatortreiniger/Der-Tatortreiniger-Bestattungsvorsorge,sendung454132.html']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2015.12.13
[debug] Python version 2.7.3 - Linux-3.5.0-54-generic-x86_64-with-Ubuntu-12.04-precise
[debug] exe versions: rtmpdump 2.4
[debug] Proxy map: {}
[ndr] Der-Tatortreiniger-Bestattungsvorsorge: Downloading webpage
WARNING: unable to extract description; 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.
WARNING: unable to extract upload date; 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.
[ndr:embed] tatortreiniger912: Downloading JSON metadata
[ndr:embed] tatortreiniger912: Downloading f4m manifest
[ndr:embed] tatortreiniger912: Downloading m3u8 information
[info] Available formats for tatortreiniger912:
format code extension resolution note
hls-meta m3u8 multiple Quality selection URL
hls-181 m3u8 320x180 181k , avc1, mp4a
hls-602 m3u8 512x288 602k , avc1, mp4a
hls-1983 m3u8 960x540 1983k , avc1, mp4a
hls-3762 m3u8 1280x720 3762k , avc1, mp4a
hds-602 flv unknown 602k
hds-1983 flv unknown 1983k
hds-3762 flv unknown 3762k
m mp4 unknown
l mp4 unknown
xl mp4 unknown (best)

Two more URLs for testing:

http://www.ndr.de/fernsehen/sendungen/der_tatortreiniger/Der-Tatortreiniger-Das-freie-Wochenende,sendung454134.html
http://www.ndr.de/fernsehen/epg/import/Den-Tod-auf-der-Schippe-Die-wahren-Tatortreiniger,sendung454136.html