Early on from the outside, it didn’t look like the flaps had been fully retracted prior to aerobatics.
Better flying example was the “Some Mother’s do ‘ave them” Christmas show.
In Canada they do not stall turn the Aerobat, because this manoeuvre is not in the flight manual.
And they don’t do inverted flight because there’s no inverted system.
I used to close the throttle and glide inverted!
No flat landings were shown in this video.