Hi,
Since you have a UP 2-8-0 #607 you do not have a 30-4208. The 30-4208-x (0= LocoSound or 1 = PS2) is a PRR 4-6-0. I would guess a previous owner placed the engine in the wrong or an available box.
Watched your video and is sure sounds like a LocoSound engine...(nice, you don't have to worry about a battery and you still have cruise!!)
Welcome to the hobby!
S/F Mike