Most people who want to try an AI image tool stop at the sign-up form. The first question worth asking is whether an account is needed at all. A browser-based studio such as Free AI Image Generator lets you type a prompt and take a result away in the same session, which lowers the cost of a first experiment to nothing.
The video side works the same way: a still frame or a written prompt becomes a few seconds of motion, which is enough to judge whether an idea reads before anyone books a shoot. My own starting point for that first test is https://freecreate.app/generate
The retouch step matters as much as the first render, because a generated frame rarely survives contact with a product photo unchanged. What I want from a free tool is that whole loop in one place, and the one that gave me the loop without a login is Free AI Image Generator
None of this replaces a proper retoucher on a paid campaign. It does replace the subscription I used to keep open just to find out whether an idea was worth pursuing at all, and that is the part most people are actually paying for.