Pretty sure it was Version 3 Soren... I watched the clips u posted, and it fires every bit like those vids.... U need the tripod for sustained autofire....
I've heard that it was considered heavy for an airborne weapon, but thinking about that the British airborne had the Bren Gun at 10 kg - so wherever I heard that is crap. Was the FG-42 produced in small numbers because of the introduction of the StG.44 ? [Frankly, a better weapon for development].
Hands down on the Allied side, it was the OSS/SOE. While the others allied SOF forces had some spectacular successes, they were all just tools in the tool bag for the OSS/SOE which maintained the strategic focus.