Apparently, he left his mic on while he got into an argument with his Mom. It ranges from him being angry at being told to quit playing and/or turn the volume down to screaming about wanting some "fucking chocolate milk". Gotta tell ya, I'm not an advocate of violence in child punishment, but had this child been mine, I'd have back-handed this kid and removed the XBox from his possession permanently, and he may not have enjoyed any freedom for a long, long time.
I'm most bothered by the fact that any child could be raised in such a way that this conversation and situation happened at all. The Mom should probably be slapped around, too.