He "stud" up?
You can see that in a 5 second video? Why do you lie to try and prove a point?
Well, he more like rolled over and kneeled, to be exact, and that's where video stops.
If you can't see well, either see the optometrist, or try another radical idea, play video frame by frame.
Now, since we're on it, I was digging little bit and I discovered few interesting things.
According to news in OP, this alleged massacre happened, or was discovered on Sunday, April 3rd. But according to Ukrainian news Bucha was liberated on March 31. Azov troops entered city on April 2. Why they would wait for full 3 days to publish this? Is it possible that Ukrainians staged it? Is it possible that Ukrainians killed collaborators, like they did in other cities. To me, it looks like staged.