A:AnswerI don't have an xbox so I don't know. However, both my PS3 and Blu-ray players are capable of playing videos through their USB inputs and these devices can be connected to the Insignia via HDMI cable.
A:AnswerDon't think answer depends on smart or blue tooth capable. Depends on "if" there is an "audio out" port. Problem is on the Insignia brand when wireless headset is plugged into the port the TV speakers are muted so only you can hear sound.
A:AnswerIf you are connected via hdmi cable, it should detect and set accordingly. You can change setting in the settings menu under video. However, it may be the "box" the TV is connected to needs to have it's video output setting changed.