I think the cat and mouse game of finding an emulator aberration vs fixing the emulator aberration is waited toward the finding side. Especially for complex systems like current mobile devices, and when they are often heavily locked down like iOS.

At some point the effort to develop a good enough emulator is more expensive than just buying the physical devices.

But another option beyond emulator vs physical devices is physical devices with physical tapping (Tapster) vs physical devices with emulated tapping. That last option seems to be what is used in your video. It might be too expensive to build an emulator, but it is cheaper to (jailbreak? and) emulate touch inputs than to pay a person or a robot to put in real touch inputs.