Data gets downloaded no matter what, otherwise we wouldn't be able to see or watch it.
I think you're getting at how to compute the hash of a video before playing it on your local device, which doesn't have an easy answer. I was just trying to point out a potential justification for wanting that capability. Implementing it may be impossible without a web of trust.
No, and no! Data are downloaded but the amount matters, a lot! Also, phone, vs tv, vs tablet, vs computer, vs wifi, vs mobile, vs 3g, vs 5g, vs dial up, etc. is a huge difference. Hashing entertainment media is a no go, DRM also plays role (some artists might want to use it, freedom right). Hash doesn’t belong here in Nostr protocol, and that’s where I draw the line. 🐶🐾🫡
I did say implementing it might be impossible. I wasn't disagreeing with you, just trying to explain why some people perceive this as a desirable feature.
