They were shot down by an anti-aircraft missile unit of the Vostok air command.

A Russian Mi-8 helicopter and an operational-tactical unmanned aerial vehicle were shot down in the Donetsk region today .
This is reported by the Air Force of the Armed Forces of Ukraine in their Telegram channel .
“On November 1, in the Donetsk region, an anti-aircraft missile unit of the Vostok air command shot down a Russian Mi-8 helicopter and an operational-tactical unmanned aerial vehicle at 9 and 12, respectively,” the report says.
(C)UNIAN 2022

And it burned and it burned until it crumpled into itself and the ground.🔥
Pretty sure this is the same Mi-8:
WARNING loud shouts at begining and end.