I've seen a video with a tool I had never seen before but in the mean time this video has been removed, So I will try to describe instead:
The general machine is a kind of CNC saw. It looks like a router, but with only 2 axis, and the material is transported by a conveyor belt instead of being attached to a plate. And the reason it MUST be like that, is that instead of using a classical milling cutter on a third axis spindle, this specific "milling cutter" is like a vertical saw, but rotating instead of vertically moved, and it's shaped like a drill bit with attachments on both ends (See illustration - fabricated from a drill bit picture).

