Video evidence may not be trusted as evidence in court in the future. Will we require something more perhaps? Or will the word of AI keen on spotting something's off be what we trust?
Photoshop didn't cause society to collapse and photoshop-for-video won't either.
the defense often cannot afford experts.
Also there is a long history of experts lying, in the U.S at least but I suppose elsewhere as well.
I'm already somewhat hopeful that if deepfakes can be reliably detected juries will be automatically skeptical of unauthenticated videos and prosecutors will view getting their videos authenticated as an easy way to strengthen their case. I already suspect close to every picture I see has been edited and altered somehow.
(And even then sometimes wonder if a hardware hack was involved)