'self.probe_basename' was None, so 'probe_executable' raised a KeyError exception
get_ca_certs
`get_ca_certs` is not available in python <3.4
[douyutv] Fix extractor and improve error handling
This is already supposed by `only_matching`
[Yahoo/NBCSports] Fix 5226 and add support for NBC sports
They seems to change constantly
Add support for the Dutch video site Dumpert. http://www.dumpert.nl/
[Xuite] Fix extraction on python 3.2
base64.b64decode() accept only binary types in Python 3.2