Takeaway

I have a question about the takeaway. As I video may swing and mark the shaft plane I note as I start the backswing and try to pull my left arm across the chest this seems to pull the club to the inside of the plane line rather then going up the shaft plane. What should I be seeing on video as I take the club back in relation to shaft plane line. As I come down I do seem to be bette on the plane line.