I've been wondering for a while now if this will lead to an unexpected boon: perhaps people will be forced to pay attention to a speaker's content instead of simply who is speaking.
Will remove all the useless “I didn’t say that”
1. True for an overwhelming majority of the body politic.
- Journalist from a respected newsroom, when they choose to keep the source confidential. So it won't be better or worse than it is now: all about transitive reputation.
The unspoken threat to further denials is the risk that the source may go public, or if unauthorized, doxxing the person who recorded the video (assuming signatures have nonrepudiation)