title: youtube-dl error outdated python
body: <p>when i try to download content from vrtnu.be, youtube-dl always returns the same error. Can somebody help me?</p>
  
  <pre><code>youtube-dl -v --username janvankerckhoven@gmail.com --password xxxxxx -fmp4 https://www.vrt.be/vrtnu/a-z/een-kwestie-van-geluk/seizoen-1/een-kwestie-van-geluk-d20180121-sseizoen-1a1/
  [debug] System config: []
  [debug] User config: []
  [debug] Custom config: []
  [debug] Command-line args: [u'-v', u'--username', u'PRIVATE', u'--password', u'PRIVATE', u'-fmp4', u'https://www.vrt.be/vrtnu/a-z/een-kwestie-van-geluk/seizoen-1/een-kwestie-van-geluk-d20180121-sseizoen-1a1/']
  [debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
  [debug] youtube-dl version 2018.03.14
  [debug] Python version 2.7.5 (CPython) - Darwin-13.4.0-x86_64-i386-64bit
  [debug] exe versions: ffmpeg 3.4.2, ffprobe 3.4.2
  [debug] Proxy map: {}
  [VrtNU] Logging in
  [VrtNU] Requesting a token
  [VrtNU] een-kwestie-van-geluk-d20180121-sseizoen-1a1: Downloading webpage
  ERROR: Unable to download webpage: &lt;urlopen error [Errno 1] _ssl.c:504: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure&gt; (caused by URLError(SSLError(1, '_ssl.c:504: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure'),))
    File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 519, in _request_webpage
      return self._downloader.urlopen(url_or_request)
    File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2199, in urlopen
      return self._opener.open(req, timeout=self._socket_timeout)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 404, in open
      response = self._open(req, data)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 422, in _open
      '_open', req)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 382, in _call_chain
      result = func(*args)
    File "/usr/local/bin/youtube-dl/youtube_dl/utils.py", line 1101, in https_open
      req, **kwargs)
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 1184, in do_open
      raise URLError(err)
  </code></pre>
  
  <p>I updated Python using<code>brew upgrade python</code>
  and I installed python 3.6.4 with an installer from python.org, but that didn't change anything.
  Thanks in advance!</p>