APPLE Hello, I don't know yet about your app content and which target you aim. Actually I'm an advertising designer with professional background in broadcasting TV as audio/video editor, author, post producer and commercial creative/maker.
It mean i can design and edit a professional advertising with call-to-action for your app.
It is possible to feature people using the devices and show the in game footages. Furthermore, i can write the copywriting for the voice over.
Please, take a look at my portfolio for some video samples.
And feel free to contcat me for further details and information.
Best regards.
A. I.