I've been banging on about this on here for decades! AoA is what the wing knows - there is NO SUCH THING as stall speed, only stall angle. Yet every time the tired old responses come back supporting use of air speed in stall avoidance.
The GA world does NOT think AoA. The airliner world is obsessed by 'speeds', and the only airliner I know with an AoA indicator is Concorde!
As the video says, the military know better. They always think AoA, just as the aeroplane does.
I've said it before, and here it is again.... I'd trade just about any instrument on the Chipmunk's panel for an AoA indicator!
There's been a problem to date with fitting them to prop singles - the propwash mucks up AoA measurement using conventional sensors. One wonders if it's significant that the aeroplane in the video is a pusher?