They all speak different but excellent english. The first two on the British side, the third clearly more in the American pronunciation.

I personally can not distinguish from this what their native language would be.

By looks the third person would possibly be in eastern Europe, the others British or close.

But even that is just a wild guess

The way the woman in the third clip make her way around the tongue twister, or made a tongue twister out of it

There’s also that unusual rolling or blending of syllables that I initially thought was how some computer nerds speak, but the woman in clip two was doing it more distinctly

They have rather different accents though which made it quite hard to guess, didn’t notice anything obvious in common across all three