My opinion, the video also shows, how unhandy the MG42 is. In game, your character moves with it like with the shorter MP40...
You must be right. The video squid definately is experianced and has obviously had the normal military training to properly operate the MG42. You can tell that by the way he handles the feed belt like a pro, and in a single smooth movement crooks the butt stock and snaps the charging handle.
There will not be in tank animations. This is a new system put in place to make tank creation easier.
Pity about the in-tank animations, yet somehow I read that as more tanks are coming