Decryption Key Length 82 changed

[cujo30227]

New youtube static decryption code for len(s) == 82:
return s[12] + s[79:12:-1] + s[80] + s[11::-1]

[phihag]

Can you provide an example URL that's affected by this problem?

[FiloSottile]

We should really not be using lengths but js player version names.

[cujo30227]

Run PIb6AZdTr-A with --youtube-print-sig-code option to get signature decryption code. I noticed it's different to the current 82 length code. I'm also using automatic extraction as first option, but I thought we wanted to keep the static keys up to date as fallback option..

[jaimeMF]

@FiloSottile we currently use the player version with the automatic signature decryption, we fallback to the old system if it founds an error.

We could remove the static signature decryption for normal videos (but keep it for age-gate videos). If we fallback to it, the algorithms will probably be outdated, we would then report the problem right there, instead of getting a 403 error during the download.