A follow up on my world war 3 post from last night

This video makes a VERY valid point. Part of the reason the cold war never went hot was because both sides had nuclear weapons and knew the consequences of using them. It's also why I question how far NATO (and the USA) would be willing to go to defend the Baltic states members of NATO. Are we willing to risk nuclear war over Ukraine. Putin is betting that we are not. And, with success in Ukraine, how long until he moves on the Baltic states?