A product film has a simple job: show the thing working, explain why that matters, and make the next step obvious. Live action where the product can be seen; animation where it cannot, for the inside of a machine, a process or the numbers; a voice that explains rather than sells. Done well it is the most useful piece of content a sales team has.
We have made product films for Reach Robotics, VAX and others, often alongside the campaign photography so the stills and the film match.