Yes, there seemed to be a distinct pitch up just before the stall. If the sound on the video is the turbine noise at least one is running, but at a constant rate. Hard to tell from a video what the props are doing except turning, but it looks like it is late finals if 1.5 km to airport.
I presume these have the usual primary and secondary stall warnings, so possible that there is another power related problem we’re not seeing here and this is a stretch the glide incident.
It seems like an odd sort of accident. I see that the ATR doesn’t have autothrottle, just notch presets.