I was debating on whether to chime in or not on this... It's hard to tell who is actually being serious (and way off base) or just joking.
From someone who is educated in sociology and human development and knows all about equal rights between men and women (and the history behind social standards), I would like to say a few things.
First, from an unbiased view of the video, we do not know the context. We do not know what led the girl (not bitch - you don't know her personally to judge) to throw the drink on the guy. And, we do not even know the relationship between the guy and girl to begin with. There could have been something that caused the girl to react that way.... well, there actually must have been because most women don't just go throwing drinks on complete strangers for no reason.
I do and don't condone the guy's reaction because there really should be no excuse for violence of any kind. Especially if what started the whole thing was words and a little beer (which does not cause physical harm). I'm glad he only knocked her feet from under her (rather than hit her or worse), but it still could do damage if she landed badly.
From a view of someone who grew up her entire life as a witness to physical, verbal, and emotional abuse, there is never an excuse to physically harm your partner/spouse, be it male or female. Abuse does go both ways. Physical violence is the most controllable... A person can simply be the better person and walk away & calm down. Abuse is scarring both emotionally and physically.
Are some people really stuck in the stone age and think that the only way to resolve a situation is to hit someone? Words solve problems, not fists. If anything, abuse will only worsen the situation and cause MORE problems than it will ever resolve.
I've been in relationships where there was emotional/verbal abuse and that was enough for me to end them. I can't fathom being physically abused by the person I trust and love. Being in a relationship is about protecting, caring, and loving the person you are with, not dominating and controlling them through fear, intimidation, and beat downs.