I understand the father being pissed off, but he blew the situation way out of proportion, 9 rounds in a laptop and grounded for 2.5 years because she was complaining about the choirs she did, to her friends on Facebook.
Thats no different than you guys telling your friends how much you hate your work and that your boss is a douche. Your intention was for your boss to never hear that.
And I can imagine that almost all of you when you were teenagers hated doing choirs, and you probably got into an argument about it with your parents, but you didn't get grounded for 2.5 years because of it (she is 15 ish, he said till college which is 18, so thats roughly 2.5 years).
I would've hated singing in a choir too. Although I don't think that was mentioned in the video...
Now chores were something I had to do a lot of, growing up. I thank my Parents for teaching me personal responsibility, and instilling a good work ethic.
Dad's computer that he let his ungrateful Daughter use? It's his to do with as he wishes.
On the other hand, I think firing off several rounds with cars driving by so closely, was pretty stupid.