Even if we can't get workable signatures from cameras, we can create workable signatures by reporters on videos they took. A reporter's reputation will become v

Even if we can't get workable signatures from cameras, we can create workable signatures by reporters on videos they took. A reporter's reputation will become valuable. Currently (many) people believe video even when it's posted by shameless, obvious liars, because hey, the video can't lie, right? Once it can, maybe they'll actually care more about the error record of the news outlet they consume from. It's still not a great situation, because it means when a casual passerby takes an important video for the first time, it will have trouble getting any traction. But maybe it's at least a silver lining.