When he deals to the other guy? or the split thing with the four aces?
I think he refers to the whole sequence.
The four ace production is by Lee Asher, something like "The Ripper." Might not be the correct name, just Google it or search for it on his site. The part where he shuffles the four aces into the pack, to end with them on top, goes as follows: Do a push-through with just four cards, strip them as you strip the packets (so that they get stripped onto the top of one packet) and do a Riffle, Riffle, Strip, Riffle sequence while retaining the top stock.