Half of the US used to be Mexico, so US Spanish is mostly Mexican Spanish. We don't use vosotros. My high school Spanish teacher (yes, I took it because it was easy) would always skip conjugations of vosotros entirely.

I don't think I've ever heard anyone use vosotros here. We understand it, but it's very uncommon. Univisión, Telemundo, Estrella, TeleXitos all mostly use Mexican Spanish. Same goes for the radio.