This one from Dmitriy Steshin, a Russkie journalist, re-posting Russian propaganda accounts taking credit for the bombing (before they decided to re-write history):
Translation here: https://twitter.com/ichbinilya/status/1512370063583686661
That video was from an exercise in February 2022 between Russia and Belarus, which still uses the Tochka-U. Debunked again. That’s why it’s important to wait 24 hours before throwing out wild accusations about a deliberately foggy situation.