Tbf, the white voice technique they are using isn’t distinctively Polish, it is relatively common in eastern Europe, e.g. the Ukrainian group Go_A uses it as well.

At least this is what a few years later the Kiwis have done and are doing right.

I only know of the AT2 anti vehicle mines from Bundeswehr. They disarm after an adjustable period of time, between 3 and 96 hours, by self detonation.

Proper mines destroy themselves after a fixed period of time.