It is very possible and in some areas it is already been used. For example there are video cameras which sign data in realtime for 4k resolution already. So yo

It is very possible and in some areas it is already been used. For example there are video cameras which sign data in realtime for 4k resolution already. So you would need microfone with TPM chip and you are good to go. You just need that video player which can verify the data.