You clearly didn't read the last link that mentions it specifically.
Recaptured on Monday. Yeah, doesn't look good for the theory that its real, as the video came out earlier than that...
So either Ukrainians filmed their war crime behind enemy lines or at best in a contested area, or it was done earlier, by those who were holding it.
So could be LPR\DPR inhabitants, as they specifically speak east Ukrainian accented Russian.
You can get that. I can get that. Anyone can, especially in a warzone where both sides take prisoners and facilities every now and then.
And here's the fun part where knowing things from before the conflict can come handy.
While Russia claims that Ukraine is failing to comply with the Minsk Accord, it is actively creating a situation where a significant number of young Ukrainians from Donbas could, in principle, be liable for conscription into the Russian army
khpg.org
A large number of DPR and LPR residents from the last few years were granted Russian citizenship, and as such, were legally and practically suitable for conscription and contract service in Russian military.
And then there are Wagner mercenaries, specifically recruiting from that region, including from the ranks of separatists:
Social media channels and private messaging groups are being used to recruit, the BBC has learned.
www.bbc.com
Wagner mercenaries are a quite plausible unit to assign recording fake war crimes to.
I do know, wanted to show the changing of hands in the region.
Umm, now you are just making shit up.
No cursive in Cyrillic?
belros.tv
Clearly Russia and Belarus governments sign their documents wrong. You need to tell them.