Well someone certainly screwed the pooch, but it could have been one of three folks. The aircraft crossed the active evidently headed for another runway. He didn't turn into takeoff position. It could have been...
1. The Local Controller who was controlling the active runways.
2. The Ground Controller who would be controlling ground movement.
3. The pilot who received a clearance to taxi to a certain position on the airport
and hold, and thought that spot was on the other side of the active.
I suspect number three as I heard early in the video reference to landing on the
left runway. That would mean the aircraft on the ground was transiting to the
right runway for take off. Airport layouts can be very confusing with all their hold
points, and often pilots who may see several airports in a single day get confused
or lost on the ground.
It could also have been the Ground Controller who thought he had more time to
get the aircraft across the active runway, or simply gave a wrong waypoint to
hold at.
The Controller who was controlling the runway may also have given permission
to the Ground Controller thinking the AC would move faster.
The landing pilot should have had the right of way, so I doubt he is at fault.
I used to investigate some of these and they can get complicated real quick.
