There’s no need to make these things Big Tech, so if that’s why you are opposed to it, reconsider what you are actually opposed to. This could be implemented in a FOSS way or an open standard.

So you not trust HTTPS because you’d have to trust big tech? Microsoft and Google and others sign the certificates you use to trust that your are sending your password to your bank and not a phisher. Like how any browser can see and validate certificates, any camera could have a validation or certificate system in place to prove that the data is straight from an unmodified validated camera sensor.