2: "Try it now!" the release always says.
3: I go try it.
4: Doesn't work. In this case, I give it a prompt to make a video and literally nothing happens, it goes back to the prompt. In the case of the breathtakingly astonishing Gemini 2.5 Coding - attach to source code file to the prompt "file type not supported".
That's the pattern - I've come to expect it and was not disappointed with Google Gemini 2.5 coding nor with this video thing they are promoting here.