Youtube Decipher Signature Not Working As Expected

Hi i am trying to decipher the signature present in youtube page.I passed the orginal signature to below function as its there in youtube html5player js(http://s.ytimg.com/yts/jsbi

Solution 1:

The deciphered signature is correct. You are doing it right but always remember to use the latest algorithm to decrypt the ciphered signature. Here I can see that you are using old HTML5 js player file. So if you are using the old file then the decrypted signature will not work for videos.