While I agree that mg42 is Op'd atm (especially in the building) I don't see much wrong with this video.
The way I see it, Soviet player did good micro play to flank Mg, but German player did well 2 to micro his mg, evade molotov and pin other squads. Then Soviet player for some reason attempted to keep fighting mg'42 and supporting eng while pinned down.
Good play by Soviet, Good play by German player. Soviet player was just fractionally late on couple of occassions.
This video doesn't say much about anything
There was a situation where the German player had a HMG-team with two Soviet squads (one engi and one conscript squad) behind it without any cover in that direction nor yellow cover.
That should be a definitive kill for the Soviet player unless the German player retreats. Instead, the HMG-team wipes the squad in front of it with some help from a nearby gren squad and then proceeds to turn around and shoot at the two squads shooting at it. While there may be some fail micro from the Soviet player here, the German player was worse and still won.