Something missing in my mind...
Acc this YT including full Taxi clrs from the very beginning issued by the TWR and ack by the lady pilot, all the clrs and taxi instructions were given regarding RWY 4L for dep.
The readbacks either, BUT...missing the RWY at 0:26 by the lady (only twys), wich ATCer included few seconds before as 04L(0:20).
However they were heading for 31L, wich acc some ppruners here it was in facto the rwy they used for departure minutes later...so, here is my question:
I presume they had loading all the T/O perf // data // SID's, etc, acc RWY31L, and also having such in their minds.
But all the way they were readbacking it to the ATC as acting for a 4L dep, including when the lady said in readback "cross 31 at kilo"
So...maybe some biased since the start to use 31L insted of 4L??
Sorry for this humble question...anyway, kudos to those who saved the day
EDIT: Ppruner colleague Draglift posting at the same time of me, said much of what i think too...my apologies (not copying at all his/her way of thinking).