Nothing is shown at 3:13. Attached is a picture of 3:13.
Like I said earlier "But both seats should be able to do everything (If it is like the Commanche)" However in Arma 3 this is not the case. The rear seat piloting can not use flares and the front seat gunning can not target lock.
I can understand how someone who is not used to flying helicopters wouldn't immediately understand these concepts. Most vehicles of both land and air put the driver/pilot in the front for the best view. Having the best view means being able to see better, and obviously seeing better helps you drive/pilot better. But attack helicopters have to take into account more than just driving/piloting.
Attack helicopters are designed so that the gunner leads the pilot.
The gunner constantly scans for targets, both with optics and the naked eye while the pilot focuses entirely on the helicopter position. The gunner spots the target and then informs the pilot to move accordingly. This is why the gunner should have the best view and the pilot should be snug with the center axis for best handling of the cyclic. The seats help them do their jobs easier.
I recommend the seat defaults be reverted and/or unlock both seats to give 100percent functionality for both piloting and gunning (Flares, locks, etc.)