Repository: yt-dlp
Issue: [Broken] Nickelodeon.be
Labels: geo-blocked,site-bug

Hi! Seems nickelodeon.be is broken.
Playback works in browser.

## Checklist

<!--
Carefully read and work through this check list in order to prevent the most common mistakes and misuse of yt-dlp:
- First of, make sure you are using the latest version of yt-dlp. Run `yt-dlp --version` and ensure your version is 2021.03.07. If it's not, see https://github.com/yt-dlp/yt-dlp on how to update. Issues with outdated version will be REJECTED.
- Make sure that all provided video/audio/playlist URLs (if any) are alive and playable in a browser.
- Make sure that all URLs and arguments with special characters are properly quoted or escaped as explained in https://github.com/yt-dlp/yt-dlp.
- Search the bugtracker for similar issues: https://github.com/yt-dlp/yt-dlp. DO NOT post duplicates.
- Finally, put x into all relevant boxes like this [x] (Dont forget to delete the empty space)
-->

- [X] I'm reporting a broken site support
- [X] I've verified that I'm running yt-dlp version **2021.03.07**
- [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
```
% python3 -m yt_dlp https://www.nickelodeon.nl/episodes/1dzmf6/spongebob-sandy-s-gekke-nichtjes-onbeveiligingsagenten-seizoen-seasonnumber-12-afl-8 --no-check-certificate --verbose -f best -r 5m -c -w --add-metadata -i
[debug] Command-line config: ['https://www.nickelodeon.nl/episodes/1dzmf6/spongebob-sandy-s-gekke-nichtjes-onbeveiligingsagenten-seizoen-seasonnumber-12-afl-8', '--no-check-certificate', '--verbose', '-f', 'best', '-r', '5m', '-c', '-w', '--add-metadata', '-i']
[debug] Loading archive file None
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] yt-dlp version 2021.03.07 (source)
[debug] Python version 3.7.3 (CPython 64bit) - Darwin-20.3.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 4.3.2, ffprobe 4.3.2, rtmpdump 2.4
[debug] Proxy map: {}
[nick.de] spongebob-sandy-s-gekke-nichtjes-onbeveiligingsagenten-seizoen-seasonnumber-12-afl-8: Downloading webpage
[nick.de] 212f8019-824f-11e9-a442-0e40cf2fc285: Downloading JSON metadata
[nick.de] 212f8019-824f-11e9-a442-0e40cf2fc285: Downloading info
ERROR: Unable to download XML: HTTP Error 500: Internal Server Error (caused by <HTTPError 500: 'Internal Server Error'>); please report this issue on https://github.com/yt-dlp/yt-dlp . Make sure you are using the latest version; see  https://github.com/yt-dlp/yt-dlp  on how to update. Be sure to call yt-dlp with the --verbose flag and include its complete output.
  File "/Users/niels/Library/Python/3.7/lib/python/site-packages/yt_dlp/extractor/common.py", line 654, in _request_webpage
    return self._downloader.urlopen(url_or_request)
  File "/Users/niels/Library/Python/3.7/lib/python/site-packages/yt_dlp/YoutubeDL.py", line 2784, in urlopen
    return self._opener.open(req, timeout=self._socket_timeout)
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/urllib/request.py", line 531, in open
    response = meth(req, response)
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/urllib/request.py", line 641, in http_response
    'http', request, response, code, msg, hdrs)
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/urllib/request.py", line 569, in error
    return self._call_chain(*args)
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/urllib/request.py", line 503, in _call_chain
    result = func(*args)
  File "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/urllib/request.py", line 649, in http_error_default
    raise HTTPError(req.full_url, code, msg, hdrs, fp)
```