Typically with my students, we never train to kick high during our training. Mostly this is because it’s difficult to develop the speed, power and flexibility to deliver a high kick unless you’ve been training them for years. They’re also easier to defend against, and creates a lot of instability for the person throwing the kick.
This video is actually interesting because one of the fighters uses it QUITE effectively. If his opponents just kept his hands up in a more defensive nature, he’d at least have a chance.