1. They show up at the same time (1:45 in the video)
a)she gets a spot at the bar
b)he excuses himself past the girl who had been there, and has marked his place at the bar with both hands.
c)she turns around to say something to him, he ignores it. 
2. he has to squeeze past the "victim" to get to his spot. (1:53)
a)he has a space at the bar, again he has his hands there
b)he gets stuck for a moment
3. things open up and he tries to get to the bar, at this point both hands are still on the bar
4. she freaks out and flips around, at this point he has still done nothing, both hands on the bar, not like he felt her up on the way past. (1:54)
5. she has completely turned around and engaged him, he still has one hand on the bar, clearly not fully engaged with the girl at this point, looks like he is facing the bar (1:55)
a)she already has her fist up
6. He is now looking at her, after she has been talking/yelling at him (1:56)
a)he still has a hand on the bar, hardly an act of the offender
b)she still has a fist raised while we see the other one pretty close to his body. 
c) can't see his other hand
7. after a few seconds of her fist up the whole time her yelling, he grabs her fist, this is the first time both of his hands are off the bar. still can't see the right. The right hand has a wrist band, I kept looking for that clear identifier and dont see it until the punch.(1:58)
8. He drags her fist down and shoves her back (1:59)
9. at the two minute mark he has her hand pinned against her body and her leg lashes out. Can't tell if actual contact was made there. and her left arm looks extended but can't see it or his right hand. 
10. he is still controlling her right arm, and someone else steps in to presumably calm the situation down, looks like this third person grabs his left arm (2:01)
11. she throws a left hook, any combination of drunkeness, use of left vs right, and or intention causes a clear punch to hit him high on the body, impossible to tell where it lands
12. she gets decked and he walks away. (2:04)
this whole thing evolves over 19 seconds. both need to be arrested. pretty jacked up how little reaction there is to this incident. in the bar fights i have seen the bar tenders and or bouncers are all over it, not the case here. makes me wonder if either there is a tendency at the bar for this action or if she is a regular at this. either would be speculation on my part at this point.