To try Movie Memory yourself, you'll need the iOS 18.1 public beta installed on your phone — and not just any phone either. You'll need to have the software update running on a device that can support ...
Note also that while the iPhone 16 Pro can shoot at 4K/120fps, that's only on its wide ("Fusion") camera. Needless to say, there are plenty of scenarios where a pro might want to capture long-range ...