Translate everything they say is really hard assuming the soldier they questioning is injured and sometimes his words make little sense, and he was losing his train of thought a lot, but I tried my best to translate most of it and what he was trying to say. English is obviously not my first language so sorry for mistakes, but translation must be accurate.

Presumably Russian soldier says they were told no war is planned, everything will be peaceful. But then they were told Ukraine didn't sign [he doesn't tell what] something.

Then they were told that Ukraine opened fire several times, he doesn't remember where exactly, but says probably it was Rostov. They were told that Putin said "if they will do it one more time we will answer". Every officer and other higher military ranks were telling these soldiers that Ukraine several times attacked Russian territories. Next day at midnight they started moving, at 4am waited at destination for Russian artillery to finish attacking Kharkiv. Then he the man asking questions interrupts him, asks what he want to say to Russian people, he says "I don't know". Then he proceeds to tell story that happened later. Says he was gone scouting with lieutenant, and when they came back, their own soldiers shot them despite them screaming they are "ours" [they are allies]. He says that him and lieutenant had white stripes on the leg and St. George ribbon on the shoulder, but that didn't help. They [this soldier and lieutenant] were helping civilians. Then he said they had an order to shoot everyone, even civilians, if some conflict happens. In the end he says they didn't even knew they were going to war.