I seem to recall that the Russian invasion of Finland in WWII failed because the Russians didn’t have adequate cold weather gear. Looks like history is repeating itself.
In part, yes. Being Russian doesn't give anyone immunity to the cold, and a poor logistical system can kill troops in bad weather regardless of ethnicity.
That being said, there seem to be an awful lot of conclusions being drawn from one bit of overhead drone footage. I personally think the daily news reports are almost useless. What does tell you something is when actual ground starts changing hands. Regardless of the spin put on that fact, "strategic withdrawal", or "gave up ground they no longer wanted", or "the loss ratio was 10-1 in favor of the defender", the loss of ground tells you who won and who lost. At least in this war.
The pro-Moscow crowd has been telling us for months that Russia will be launching a massive winter offensive any day now that will retake all the lost ground and shatter the Ukrainian army. So I'm watching for that to happen. Or not happen. Until then, I figure it's just propaganda on both sides.