http://gitunderground.i2p/archive/youtube-dl/src/commit/eed784e15f6066b152a3cce8db6fe3f059290b22/youtube_dl/extractor/youtube.py
kbjggqkzv65ivcqj6bumvp337z6264huv5kpkwuv6gu5yjiskvan7fad \ .onion ' , r ' (?:www \ .)?grwp24hodrefzvjjuccrkw3mjq4tzhaaq32amf33dzpmuxe7ilepcmad \ .onion ' , r ' (?:www \ .)?hpniueoejy4opn7bc4ftgazyqjoeqwlvh2uiku2xqku6zpoa4bf5ruid \ .onion ' , ) _VALID_URL = r """ (?