Hello again. I recognize you from your game.
I would think you could control the location and rotation of the camera the same way you would any other actor. The problem might be that the camera is attached to the boom. If so, maybe we can find out how to detach the camera temporarily while time is reversed and then re-attach it. That means at the end we might need to set the boom rotation so reattaching the camera looks smooth.
Another thing I thought was you might want to look into Sequencer. This isn’t reversing time but it shows that Sequencer can record tracks in realtime: Unreal Engine 4 Powers Real-Time Cinematography at SIGGRAPH - Unreal Engine.
You can give a negative play rate to an animation and it will play it backwards. In your AnimGraph, select a Play Animation node and turn on the “As Pin” for “Play Rate”. Use a variable to feed -1.0 into all your play nodes and you should see them play backwards. The problem is the transitions won’t work backwards. I’ll have to think about that one or maybe someone else knows. Again, I suspect Sequencer would handle it.