Pretty straightforward the point of this part. When the allied economic snowball started to roll there weren't stopping. Germany could have hold herself against Britain, but not with USA and SU.
One note: the SU had the luxury of not building a real fleet, they could concentrate on ground and air forces. Tho seeing the numbers here >>34053 without the US entering the war I doubt they could have hold out so the opinion posted in the OP of the Suvorov thread (in the video for sure, I can't remember if Suvorov really stressed this I don't think so) that the SU didn't need the land lease is most likely false. It not just helped, it helped a lot.

>>34054
Yeah, after the war another economical race started, they couldn't allow to waste all the potential of Germany.