Now, I'm not completely fluent enough in Japanese to understand what she's screaming about, but I'm pretty sure it's because the neighbours are playing their music too loud. And while some people might feel the need to call her a spoilt bitch I kinda feel sorry for her. I mean, why can't whoever's playing the music get some headphones or something?
Most western people don't realize it, but Japanese women can be very scary when they get angry, especially when directed at their dad or husband (remembers when sister-in-law got mad at brother-in-law, threatening him with a knife ... true story!)