A cheap Allwinner SoC has enough compute to do what they’re showing. So, yeah, China.

Likely more expensive since you need enough onboard compute to run the computer vision.

That said, it’s potentially reusable. The next logical step would be to add some sort of tether that entangles the target drone. Right now, it’s just relying on direct impact to knock the other drone out of the sky, but all you really need to do is ensnare the props. That’s doable without destroying the hunter drone.