Not to be a clever clogs about it, but the same pattern of blue flashes are often seen in significant freezing rain conditions when transformers or wires flash

Not to be a clever clogs about it, but the same pattern of blue flashes are often seen in significant freezing rain conditions when transformers or wires flash over. I believe the possibility of a piezoelectric effect, but the specific blue colour is what makes me think of a power lines versus fracturing rocks. You can see that sections of the grid flicker in line with the transformers shorting out. However, there is a distinct short white flash at the 12 second mark, before the longer blue flashes start which I would presume has a different cause.