Speculation has it that either “Palyantsia” (small turbojet drone) or “Neptun” (sizable cruise missile, antiship with ground strike capability) were used. Since part of the Russian facility was hardened and underground, I would ordinarily favour the hypothesis of “Neptun”, but it’s supposed to be out of their range and the videos recorded over Russia featured a turbojet sound and the video you linked has a small explosion (this would fit “Palyantsia”, since it’s small).

As a happy user of Signal (no bugs or incidents from my viewpoint), I regardless chime in to say a word for decentralization. :)

Signal is centralized:

• there is a single Signal implementation, with a single developing entity
• you have to install its mobile version before you may run the desktop version

There exist protocols like Tox which go a step beyond Signal and offer more freedom -> have multiple clients from diverse makers (some of them unstable), don’t have centralized registration, and don’t rely on servers to distribute messages - only to distribute contact information.

In the grand comparison table of protocols (not clients), Tox is among the few lines that’s all green (Signal has one red square).

/me listening to the sound of a WinXP virtual machine booting under Debian Linux

They can shoot their foot with a grenade launcher next. I’m already out of range.