Video here: https://www.youtube.com/watch?v=ldwWfQb4Odo
The second video is much more revealing. It shows the 130 having a distinct yaw to the left as it's course changed about 70 degrees without the bank you would expect with that type of turn.
At 2:45 to 2:51 the plane spins on the yaw axis. At about 2:46 the flat turn begins to be noticeable. At 2:49 it almost has the appearance of a flat spin. By 2:53 the course has changed by about 70 degrees and the plane takes a distinct nose down attitude. Then they spin in.
That flight profile points to hard over rudder or dual engine failure on the left wing, either catastrophic at climb out speed..
Yup - the wing over stall looks like left side loss of thrust (dual engine failure) as seen from my office chair, in front of a PC screen.