In short, it’s an advert for the people, their skill, the lighting equipment, the rig, the gimbal, the editing team.
It’s not really an advert for the iPhone.
If you think it’s impressive it’s shot on the iPhone (I have a 14 Pro btw, essentially the same camera set up we the 15 Pro), then you don’t understand which weights more in the equation in getting that video shot.
And that’s what some people do, they see the headline and whilst it’s true, the small print is what makes the video, the phone is a minor supporting cast. The star of the show is the lighting and the team.