YouTube Signature Decrypter
A (serverside) python helper for decrypting youtube videos signatures. The actual signature decrypter is provided by https://github.com/rg3/youtube-dl/ which is required to be available on the same machine for the script to work.
Point the _sighelper.py to the signature decrypter in your youtube-dl copy:
...
from youtube_dl.extractor import YoutubeIE
from youtube_dl.utils import write_string
...
arg[1]: encrypted signature.
arg[2]: video id.
arg[3]: Video player url.
#Output
decrypted signature
#Example:
$ _sighelper 2632A05256F6B7C1B4A133C5E22E2AC1FE6D36996.DC02CDEDFEA0911562A5D59533693512B0D25242242 oRdxUFDoQe0 http://s.ytimg.com/yts/jsbin/html5player-vflO-N-9M.js
#Wrapper
_sig.php is a php wrapper for _sighelper.py. Its content is pretty much self-explanatory.
Feel free to submit any other wrapper that might be helpful to others. Thanks.