“We haven’t attacked Ukraine either. We’re defending our territory”, “Ukraine was ours then [in USSR], too!”, “It [Ukraine] was always part of Russia”, - this Russian woman is a good illustration of how an average Russian person sees the war and Ukraine. It is a mix of propaganda, ignorance and stereotypes, with little independent thinking.
The object of propaganda is to overwhelm critical thinking and annihilate the truth.
What many “Westerners” don’t seem to understand is that in communist countries it was perfectly normal to operate under double think. They knew the truth, but also knew that saying that truth would get them in trouble. So there was the opinion for “outside” and the opinion for “inside”. That way of thinking still runs deep in Russia - and quite honestly, if a camera would be pointed at me, I might also just parrot the party line, otherwise…
That doesn’t mean, that there aren’t true believers, there are probably plenty, but you should not try to understand the average Russian by watching these videos.