The damage will really lie where it already does today, where people consume info without any filters in whatsapp groups within their bubbles. If they can believe a photoshopped image with a caption, they will be much more inclined to believe video "evidence", and no explaining of deep fakes will convince them otherwise.
Any tamper proofing process may be viable for news outlets and courts, but if the technology is easy enough to use there will be no escaping spreading of fabricated facts.
Any tamper proofing process may be viable for news outlets and courts, but if the technology is easy enough to use there will be no escaping spreading of fabricated facts.