Traceback (most recent call last):

 "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 655, in extract_info
ie_result = ie.extract(url)

 "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 286, in extract
return self._real_extract(url)

 "/usr/local/bin/youtube-dl/youtube_dl/extractor/generic.py", line 1804, in _real_extract
raise UnsupportedError(url)UnsupportedError: Unsupported URL: http://player.bfi.org.uk/film/watch-barging-through-london-1924/
Traceback (most recent call last):


 "/usr/local/lib/python3.5/site-packages/celery/worker/worker.py", line 203, in start

self.blueprint.start(self)


 "/usr/local/lib/python3.5/site-packages/celery/bootsteps.py", line 115, in start

self.on_start()


 "/usr/local/lib/python3.5/site-packages/celery/apps/worker.py", line 143, in on_start

self.emit_banner()


 "/usr/local/lib/python3.5/site-packages/celery/apps/worker.py", line 159, in emit_banner

string(self.colored.reset(self.extra_info() or '')),


 "/usr/local/lib/python3.5/site-packages/celery/apps/worker.py", line 190, in extra_info

tasklist = self.tasklist(include_builtins=include_builtins)


 "/usr/local/lib/python3.5/site-packages/celery/apps/worker.py", line 183, in tasklist

'
. {0}'.format(task) for task in sorted(self.app.tasks)
TypeError: unorderable types: NoneType() < str()
