The idea of a signed and verified stream has only been used to enforce old-school distribution rights. Because of this, the implementations are clunky and have zero incentive for consumer adoption. Why buy your own handcuffs?
The incentive is to prove that the video is not AI generated. Useful for consumers, news organisations, camera manufacturers, etc. The idea would be you can still copy the file/change the video, but the signature will no longer be valid. It's not mean to be restrictive like handcuffs/DRM.
