The freecoaster is for coaster brakes.
Your turn it on so when you pedal backwards it engages the coaster brake or you unscrew two screws so that the brake doesn't engage. It means when you roll backwards you don't have to pedal backwards as with a normal freewheel.
I think he is talking about a fixed gear. One that you pedal forwards it goes forwards. You pedal backwards you go backwards.
Fixed wheel instead of Freewheel.
Didn't wheelie specialists like Craig Strong use a Fixed wheel?