To be an Experimental Test Pilot you need to be a fully qualified Fighter Pilot, with some University or Engineering degrees - then you can apply to the competitive exam to enter the Test Pilot School, from which you will graduate or not.
Then you will start a Test Pilot career, usually on fighter programs, and then maybe if you are interested in, you wil be hired by Airbus (or Dassault, or BAe)
Then you will be able to be part of a briefing/flying display like the one we are discussing here.
For that you need to be from a country with an aircraft industry (so OK for french, brits, italians, germans, swedish or swiss a little bit, brasilians, americans canadians, russians of course... but no hope for NZ or Aussies or Greeks, Austrians, Danish...)
and no hope of course for self-sponsored airline pilots with no University background .... they just can call themselves "test pilots " if they are TRI in a big airline and do acceptance flights, which is by now way relevant.