A few years ago ads for the Panasonic GH1 were revealed to have been shot with a Canon 5d - Panasonic said that the advertising company pitches the idea and are left to their own devices to shoot it.
"You will use the product (Nokia Lumia 920 Pureview) to shoot example clips. No other cameras are to be used as a stand-in for the cellphone."
You're insanely incompetent if you can't let your creative agency know this.
Your creative agency is insanely stupid if they think it's okay to pass footage from another camera off as from the product being advertised.
Except they do. They can dictate whatever they want to the ad company, and they have to do it. You know why? Because Nokia is paying the fucking bills.
This is a disgraceful fake.