Thanks for this film , Leo45, I discovered it.
I did not know that the IV had electric controls.. must be one of the first a/c type no ?
I remember , being a young controller , controlling the IV take off in Bordeaux around 1972 , always with JATO rockets , blockig the runway twice, first on dep by the team that was arming the Bomb when the a/c was lined up , and then on return with his braking parachute that a team had to look for after it jettisssoned it.
All this at night ,and in an airport with Commercial operations !
Good memories.