A:AnswerNot directly since this is not a SmartTV. However, if hooked up to an external device using an HDMI cable, the picture quality is great. We stream Netflix on this TV all the time.
A:AnswerYes - I needed same connections for my Wii - it supports red-white-yellow inputs and I labeled the input GAME on the TV menu. It also supports the component Red-Green-Blue input if you need that.
A:Answeryes i would recomend getting a HDMI cable and upgrade to hd box. If using satilite such as direct or dish your can call them and ask for hd upgrade.
A:AnswerNever tried USB, I am using a HDMI cord with a computer to TV switch to watch movies from my PC works greats. The switch is necessary to send Audio sound to TV.