Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/usr/bin/youtube-dl/__main__.py", line 7, in <module>
    __init__.main()
  File "/usr/bin/youtube-dl/__init__.py", line 536, in main
    _real_main()
  File "/usr/bin/youtube-dl/__init__.py", line 520, in _real_main
    retcode = fd.download(all_urls)
  File "/usr/bin/youtube-dl/FileDownloader.py", line 475, in download
    videos = ie.extract(url)
  File "/usr/bin/youtube-dl/InfoExtractors.py", line 80, in extract
    return self._real_extract(url)
  File "/usr/bin/youtube-dl/InfoExtractors.py", line 2541, in _real_extract
    mediaURL = mediaURL % (video_id, stream_token)
UnboundLocalError: local variable 'video_id' referenced before assignment