Looking at the video, it's clear the guy provoked the girls reaction throwing the drink in his face.
Sequence of events:
1: They talk back and forth. (Between the both of them not understanding what they're saying at each other).
2: The girl walks away. (At this moment the guy makes a pussy move and follows her to continue the drama).
3: Guy makes a hitting motion towards her face.
4: Girl throws drink in his direction in a reaction of frustration of being threatened.
5: Guy proves he can be an even bigger pussy and kicks her to the ground.
She didn't deserve it.
The right thing for a man to do is to walk away from situations like this in the video as soon as possible...and this idiot got the chance and still save face...but as a kid and bitch that he is he didn't walk away (Or better said, let her walk away as she was walking away already) when he could.