Product work is where generated video is most often obviously generated, and this prompt avoids nearly all of the usual tells. Reading how is more useful than reading what it depicts.
It starts by choosing a subject that does something. Espresso pulling into a glass with crema blooming and swirling is a transformation with a beginning and an end, which means five seconds has an arc rather than a duration. Most product prompts describe an object and then have to invent a camera move to give the clip somewhere to go; this one does not need one, and the camera stays almost still as a result.
The lighting choice is the second good decision. Bright morning light through a cafe window is a motivated source — there is a reason for the light and it is in the world of the shot. Chrome is a mirror, so a portafilter rendered under unmotivated studio light shows you reflections of nothing, and reflections of nothing is one of the most reliable ways a viewer knows something is synthetic without being able to say why.
Then three imperfections in a row: steam curling, water spots on the chrome, a few coffee grounds on the tray. None of them is the subject. All of them are evidence that the machine is used. The water spots in particular are doing the work of a hundred words of description, because a spotless chrome surface is the default a render produces and a spotted one is not.
The camera is described in six words — 100mm macro, shallow focus, slight handheld drift — and each does one job: how close, how much is sharp, how alive. That is a complete camera specification for a shot like this, and adding to it would take away from the subject.
A quarter of the prompt is sound, and the mix is layered by distance. The grinder is winding down, so it is already finishing as the clip starts, which places the shot in time. The pump hiss and the liquid pattering are at the subject. The chatter is behind. Four sources at three depths, generated in the same pass as the picture — on a silent model this shot needs a separate sound design brief and a sync pass to reach the same place.
Video