You can decide who can watch your uploaded games and highlights. To set the video sharing, tap the dot icon for a selected game in the My Games tab. Here you can edit the information about the game. By turning on Share with followers on (toggle right), everyone including followers can watch it, and by turning it off (toggle left), only members can watch it.
To set the highlight sharing, swipe left on the highlight you want to change in the Highlights tab. You can then set the sharing range by tapping the icon in the middle row. The highlights have a personal setting for creating highlights that only you can watch.