How can I change camera positions and angles with the new replay feature?

All of my Camera Track Recording buttons are greyed out and i cannot click them? did you have the same issues?

EDIT: Worked it out, you still first do a normal record and then on playback you hit the camera track record so that you can view the replay as you described. This feature definitely needs quite a lot of work and i would eventually want something like FSX where i can just go and jump back a few minutes of the flight at the end to rewatch my landing etc.