https://twitter.com/livi_kivi/status/1215337006596751360
Allegedly, the video was posted via Telegram, purportedly depicting a TOR M1 missile striking the Ukrainian International flight, PS752.
Canadian Prime Minister Justin Trudeau just held a press conference confirming the theory Iran shot it down. Whether or not that gives credence to this alleged video is up for debate.
Damning evidence, if true.
h/t makemuricagreater