For most of the last two decades, video production followed a predictable hierarchy. Agencies with cameras, lighting rigs and editing suites got the best results; everyone else settled for stock footage or shaky phone clips. That hierarchy is collapsing fast. An ai video generator can now turn a written prompt, a single photograph or a four-second reference clip into finished footage that holds up on a phone screen, a paid social placement or a presentation to a client. The shift matters because attention is finite and expensive. A brand that once published four polished videos a year can now publish forty variations a week, testing hooks, faces, colours and calls…