littco
Also the prop you can see in the video detached from the engine segment looks very much like it feathered at the time,
That would be difficult to assess from the video footage as the engines / gearboxes may have separated during the initial impact with the blades then adopting new positions.
Impact damage to the propellors, engine compressor / turbine blades and main engine compressor shafts will highlight if an engine was developing power or windmilling at the time of impact.