Unfortunately that doesn't prove too much. It all hinges on the cameras, which are just computers, operating in a verifiable fashion. Which they don't, as no consumer available computer currently does, and I don't see this changing in the near future, both for technological and political reasons.
I put a lot of effort into thinking about what could be proper trustable on photos and videos [0], but short of performing
continuous modulation on the light sources the light of which is eventually captured by the cameras' sensors, there's no other way, and even that I'm not sure how would work with light actually doing the things its supposed to (reflection, refraction, scatter, polarization, etc.). And that's not even mentioning how the primary light source everyone understandably relies on, the Sun, will never emit such a modulated signal.
So what will happen instead I'm sure, is people deciding that they should not let perfection be the enemy of good, and moving on with this stuff anyways. Except this decision will not result in the necessary corresponding disclaimers reaching consumers, and so will begin the age of sham proofs and sham disprovals, and further radicalization. Here's to hope I'm wrong, and that these efforts will receive appropriate disclaimers when implemented and rolled out.
[0] related in a perhaps unexpected way: https://youtube.com/shorts/u-h5fHOcS88