This is one example (another one is allowing people who cannot read or write to create legally-binding video statements) where it would be handy to be able to p

This is one example (another one is allowing people who cannot read or write to create legally-binding video statements) where it would be handy to be able to prove that a particular video came straight from a camera. This falls under the general heading of "remote attestation" technology (as the person I am replying to probably already knows).