Matinee issue- U.E 4.7.6

The camera actor and preview window do not move or display movement when the animation is playing. In matinee the white animation bar is moving but the camera and preview remains static. The preview window does not show movement while the camera is being manually moved, but will update once the camera has stopped. Any help in this matter would be appreciated.

Make sure Real Time is enabled in the viewport. That camera previewer requires real time to be active otherwise it updates as you described.