It’s hard to tell with such a short clip, but to my eye, it looked to have enough forward velocity for lift, unless it was fully loaded with fuel and cargo and flaps were off.
But if it was a cargo-shift forward of center mass, perhaps he couldn’t bring the nose up. Impossible to see from hat clip where the ailerons are, but if they were full up, then maybe it was the load shift.
https://www.youtube.com/watch?v=ldwWfQb4Odo
The second security camera view (starting after halfway through this video) shows a lot more.
It appears level when it enters the view at the top (not an uncontrolled load shift) and though it appeared to be slowly losing altitude it didn’t look like a full stall, nor slow enough for one.
I’m still wondering if those flaps were set to zero too early, but I don’t know how far from the air strip this was. Perhaps a power loss.
The maneuver at the end is just nuts though. I can’t imagine the rationale for it being intentional unless the pilot decided the entire area was far to densely populated and overdeveloped for a horizontal makeshift crash landing and just sacrificed the plane and the crew for the sake of the people on the ground.