Unfortunately, that video does not explain anything at all. I now know that the product can be used with a mouse, that I can select things and set some properties. Who is it for? What does it do? Why should I use it?
There might be other explanations than a cyberattack though. The pagers could have been prepared in some way before distribution.
From the videos, it looks like the explosions were quite sudden and remarkably violent for such a small device.
So in addition to people-hunting FPV drones, we now have the equivalent of exploding collars from science fiction movies like Running Man. I don't like where we're heading, but it was probably inevitable that technology would be used this way.