It's very related: it's mentioned in the article. :)

Very interesting video!

In the slowed version it seemed like the operations were fully sequential, I think they might be able to achieve a shorter time by overlapping some operations and potentially with edge-cutting too

In the slow-montion footage of the shared faster Mitsubishi robot you can see it's doing some operations in parallel (but not edge-cutting)

I think edge-cutting would possibly just disassemble the cube at this speed.