Update vube.py

fix extractor is broken #3459
Merge pull request #3461 from tinybug/patch-2

Update vube.py
[vube] Extract audio and categories
[xboxclips] Add new extractor
[nowness] Add support for cn URLs (Closes #3465)
Merge branch 'xboxclips' of https://github.com/pyed/youtube-dl into pyed-xboxclips
[xboxclips] PEP8 and extract more metadata
Merge branch 'pyed-xboxclips'
Merge remote-tracking branch 'upstream/master'