There is no audio and someone's rant on youtube is not considered factual. Does she think the airport scanner will make the milk radio active?
I don't know what this woman's problem is, nowhere in your link does it say that breast milk will be excluded from x-ray scanning, it says that in order to bring an amount in excess of 3 ounces will require additional
screening at the x-ray point, not instead of x-ray.
It appears she's wrong and they're right.