I haven't seen those videos which is probably a good thing. Russians are known for their brutality. Doubtless there is brutality on the Ukrainian side as well. Both side have exchanged many prisoners so clearly it's not a matter of policy to execute them. Many Russians have family in Ukraine and vice versa.

It's pretty much a bloody mess. It's also complicated. For me it boils down to the fight between freedom and democracy and oppression and totalitarianism. Putin wants the world to be a worse place for all of us and is willing to have hundreds of thousands of people die for that.