BS. Sure, the Russian winters harmed the German war machine greatly, but it's not as though that alone was the sole determiner of the outcome of the war. Even had the winters been milder the Russian forces would still have taken a heavy toll on the Germans and were nearly guaranteed to win that conflict by benefit of logistics alone.
Moreover, even had Russia fallen to Germany the American/UK military might by 1945 was far too great even for a Germany backed by the natural resources of Russia to withstand. By mid-1945 the allies had put together a machine in the Pacific theater in the form of bombers, submarines, and combined forces capable of razing cities, ravaging shipping, and conquering territory at an incredible rate. It would have been perfectly possible to direct some or all of that apparatus at an unbowed Nazi regime in mid to late 1945 through 1946 and visit utter devastation on Germany until it was incapable of fighting any war. And this is sans nuclear weaponry, factoring those into the equation merely accelerates the end of this hypothetical war. Such a war would have been even more brutal than WWII was, but the outcome would not change.
How do you define "fallen"? I'm pretty sure Germany didn't have enough forces to destroy all the Russian production centers in, and to the east of, Ural.
Well, sure, this is why this is a hypothetical point. The likelihood of Germany having survived the battles on the Eastern front was low, the likelihood of them actually conquering Russia even lower.
Moreover, even had Russia fallen to Germany the American/UK military might by 1945 was far too great even for a Germany backed by the natural resources of Russia to withstand. By mid-1945 the allies had put together a machine in the Pacific theater in the form of bombers, submarines, and combined forces capable of razing cities, ravaging shipping, and conquering territory at an incredible rate. It would have been perfectly possible to direct some or all of that apparatus at an unbowed Nazi regime in mid to late 1945 through 1946 and visit utter devastation on Germany until it was incapable of fighting any war. And this is sans nuclear weaponry, factoring those into the equation merely accelerates the end of this hypothetical war. Such a war would have been even more brutal than WWII was, but the outcome would not change.