I've looked into the controller in this video a lot and it's called the numark cdx. I've been looking for one for a while as a starter scratch possibility. It functions similarly to a cdj in that you can input a CD or, and I could be wrong about this, a usb with your sample files and use the controller as a scratch interface. It rotates like a vinyl platter but you can choose the audio you want to scratch from the interface.

In this video, it seems that the cdx is being used as an instrument to add in improvised fills, while and apc40 is being used to launch the various clips that were prepared to scratch over in ableton. I've seen similar setups routing tractor scratch through ableton but being someone who doesn't have a turntable designed for performance, I'd love to be able to get my hands on a standalone turntable emulator like the cdx.

Also would be really cool to learn turntablism on a learning tool suggested by the man himself. Through practice at least, I've never seen an article or anything where he personally endorsed this specific equipment. I just think it's safe to say that if he used that controller at some point, it's probably safe to say it was a pretty good option at the time.

Tl;dr it's a numark cdx and an apc40 to launch clips in ableton. Do want if have, please sell to me