This one goes more into military/stategic concerns of Russia, and the basis for their fear of invasion. And also their burning desire to regain their national pride after the humiliation of the 1991 collapse of the Soviet Union. It's likely they wouldn't be so eager to invade and reclaim those former Soviet states, if those former Soviet territories were not being absorbed into NATO and the EU. I can certainly see where that would be threatening.
But adding a point not in the video, during the Cold War, despite the enormous expense of the U.S. military during the Cold War, it was never even 15% of the U.S. GNP. Whereas in Soviet Russia, it was closer to 50% of their total economy. A big part of what bankrupted the Soviet Union.
Russia has a total GNP on a par with Spain, Australia, South Korea or Canada, and yet competes with a U.S. that has more than tenfold its economic resources. But that doesn't mean Russia can't win. A nightmare scenario would be if Russia began a war in Europe, simultaneous with a Chinese war on Taiwan and the South China Sea. That would overwhelm the U.S.'s lost capacity to fight simultaneous wars in two theatres (what had been the U.S. military size from 1945 till the 1991 Persian Gulf war, before downsizing).
In which scenario, the Ukranians and the Georgeans would be toast.
