He skidded the airplane. He applied rudder trim so that the tail was not directly behind the aircraft. He also mentions trying to be nose high.
What this would look like I think. Slow down to increase angle of attack in level flight. The nose is now high (likely already occurred after flameout and ejection attempts without thinking about it - check). Go full deflection rudder trim to skid the aircraft. Now trim the ailerons and elevators to fly level based on drag and adverse yaw. Get out.
Imagine if a car had a setting for every input equivalent of setting speed via cruise control - this is what trimming is.
A car equivalent would be applying the handbrake and "trimming" it so it sticks with your hands off, then steering into a skid so you're drifting, then trimming the steering wheel; now your car is moving in an otherwise dynamically unstable configuration (drifting), but it maintains the configuration hands-free because you have locked-in the settings. A driver could then step out of a moving vehicle without the risk of being run over by their own car
What this would look like I think. Slow down to increase angle of attack in level flight. The nose is now high (likely already occurred after flameout and ejection attempts without thinking about it - check). Go full deflection rudder trim to skid the aircraft. Now trim the ailerons and elevators to fly level based on drag and adverse yaw. Get out.