I watched the track, you never turned on your left/right engine fuel flow switches on the throttle!
Leave your throttle alone, keep it behind the "hump", turn on the inverter and battery switch just like you did, then main and wing boost pump switches (left/right), then turn on the LEFT/RIGHT engine fuel flow switches (top of your throttle), the APU...let her start up and settle, then move throttle to idle, then you can turn on your APU generator switch and the left/right switches below ok.