He's using two wireless lav mics for the actors. The receivers are mounted on the back of the camera, and running out to a Beachtek mixer mounted on the Manfrotto rig. The audio runs out of the Beachtek into inputs 1 & 2 on the camera. He's doing this for better control of the audio signal from the wireless mics.
I could hear him perfectly easily.
he doesnt say much about his sound kit at 1 min, other than to identify he has 2 radios (which happen to be sennheiser G1 old radios) and a beachtek vu control which is a metering device for his audio before it goes to the cameras. he mentions a manfrotto zoom demand (not audio) thats about it.
Maybe its because im also english