The speed limit on that curve is for 50 mph. That train on that video was doing well in excess of that speed.
Sure looked like it was over speed limit. Malfunction, operator incapacitated or distracted? We’ll find out.
The crash occurred at 9:23 PM. That train should have left 30th street station at 9:09 PM and then would have departed Trenton at 9:37 PM.
Not sure if that means it was running late, which might be cause for a little speeding en route.