A:AnswerAs long as the bracket can reach two studs you are good, the tv is able to slide back and forth on bracket for centering. However you don’t want your bracket to stick out on one side.
A:AnswerYou can slide it on the bracket left and right with some effort (I would recommend 2 people) and after loosening the clip screws but in terms of easily accessible swivel...that is only up an down.