In the event of litigation (in court or in the public sphere), one would be at a disadvantage if they don’t have video of their side.

Like how you should have a dash cam for your side in a vehicle collision. Although, maybe sufficiently convincing fake videos will make it a moot point in the future.

I think it'll just desensitize people. Long time ago a kiss on a movie theatre screen was enough to make people protest and leave in indignation. Now everybody is few taps away from hardcore porn all the time and not many people care.