[Medialaan] Episode extractor broken, due to new api

[kenavera]

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2018.05.18. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

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• At least skimmed through the README, most notably the FAQ and BUGS sections
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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add the -v flag to your command line you run youtube-dl with (youtube-dl -v <your command line>), copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'https://vtm.be/video/volledige-afleveringen/id/vtm_20180504_VM067DA79_vtmwatch', u'--netrc', u'-v']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2018.05.18
[debug] Python version 2.7.13 (CPython) - Linux-4.13.0-41-generic-x86_64-with-debian-stretch-sid
[debug] exe versions: ffmpeg 2.8.14-0ubuntu0.16.04.1, ffprobe 2.8.14-0ubuntu0.16.04.1
[debug] Proxy map: {}
[Medialaan] vtm_20180504_VM067DA79_vtmwatch: Downloading webpage
[Medialaan] Logging in
[Medialaan] vtm_20180504_VM067DA79_vtmwatch: Downloading JSON metadata
ERROR: An extractor error has occurred. (caused by KeyError(u'response',)); 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 "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 503, in extract
    ie_result = self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/medialaan.py", line 207, in _real_extract
    data['response']['uri'], video_id, entry_protocol='m3u8_native',
KeyError: u'response'
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 792, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 516, in extract
    raise ExtractorError('An extractor error has occurred.', cause=e)
ExtractorError: An extractor error has occurred. (caused by KeyError(u'response',)); 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.

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Description of your issue, suggested solution and other information

Medialaan is now using a new api for all their full episodes and therefore the videos can not be downloaded. They are now using https://vod.medialaan.io/vod/v2/videos/[VIDEO ID]/watch?access_token=[ENCODED ACCESS TOKEN]&apikey=[ENCODED API KEY] to get the m3u8 from. However we require an access token that is not currently in the data we get and it changes every call.