It's a good idea to immediately neutralize a female physical aggressor or anyone initiating an assault. Ultimately, the video footage will prove you acted in self-defense. Merely restraining a female attacker can quickly get very ugly, because people passing by will usually think the man is being the aggressor, especially if the woman is shouting out lies that he's the person assaulting her, while she's actually the person attacking him. That means more people will physically get involved and now you have a huge mess where there is a higher potential of people getting seriously or permanently hurt, and legal ramifications are less likely to be in your favor because of the muddied incident. Simply knock her out the moment she tries to assault you. Wait for the authorities. Show them your video proof of self-defense.