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Optimization in the interpretation of the throttling parameter
I would like this optimization to be tested.
For each stream, YouTube sends a different signature, but the throttling parameter only changes from the adaptive to the progressive format. So now pytubefix checks if a given parameter has already been deciphered and reuses it, avoiding several calls and reducing the use of jsinterpreter.
I particularly achieved good results, with a difference of around 2 seconds compared to clients who do not need decryption.