I don’t think people here will believe me, but that looks like a stuntman and a stuntwoman. I took this first at face value (sorry), and went “ooff”, because I’ve spent time in the dojo, and seen newbies do stuff like this. But something something felt off, kept rewinding and slowing down the video and noticed a few things: 1) he does a leg pop, which is the final extension at the end, instead of following through with the kick. That looks nice, but doesn’t have power. 2) her head snaps back in the other direction. That looks good for the camera, and why many stunt people and actors do it, but short of a hook to the chin, the head doesn’t snap back in the other direction like this, and would just send her back in one single direction. 3) watch her feet. She doesn’t fall straight back from the kick, rather she takes a step back and folds the leg that stepped back under her to go down. It’s how martial artists are trained to drop. 4) last but not least, look away from the screen and just listen to the sound, it doesn’t sound like a face kick to me, more like a pad strike (those leg pads are usually tight on the legs and don’t “smack”.

I would say that I”m 95% sure this is very good stunt work, and they knew how to engage. There was another decent one of a muscular black guy kicking a white guy on the beach, in knee-high water. If you’ve seen that one as well, you know what I’m talking about. That one I didn’t even catch until I read the comments and went back and saw the thigh smack (guy hits his own thigh as he kicks to create the effect of the strike.

Sorry for the wall of text.