FEW REPLAY EDITOR OPTIONS TO ADD

Ah so if im understanding correctly this feature is basically already in the game, after you place a keyframe a new input for "disable/enable preview" pops up on the HUD, press the start button to toggle it and you can move the camera freely as the video plays (ignoring your already placed keyframes while preview is off), the only real difference for skate vs shredders maybe is that you will need to pause the clip to add the keyframe but that shouldnt be to big of an issue probably. so if anything i could see you asking for that specifically, letting us place keyframes while the video is playing? but either way that should be basically what your looking for already! :p

In Shredders (snowboarding game) you can add key frames and move camera when playback enabled. It's just so much faster to make a good looking run. 

As for the playback it won't change the point of view because it's actively displaying the current clip to the settings and angles of those frames to you.

Basically you cannot watch and edit at the same exact time, that's how games in general have worked for the past decade when it comes to this feature unless it has special software after certain point. Within the decade the only thing that even comes close to what you're expecting is when you complete a speed run in racing games because the run is complete you can fiddle with the POV of the replay.

That's the point of the free function at the start unless you angle the next keyframe to whatever angle you want next. It could be a snap effect which you could slowdown the playback speed for or the next frame use the tripod option then transition to orbit 

Wait. Now that i read your reply again i understood and yeah, it works when inserted first keyframe then press play. 

BUT THIS IS THE SECOND FLOW KILLER: U cant move free camera when playback enabled! Crack that macro function Mr. Mrs kittenboss (sorry imma mess) 

I always use free camera. You just didnt get it and thats ok. When in stop u start hover camera to random place and when you press play, camera focuses on player. 

Go to advanced then choose the option called 'free' it does that for you while in the editor. Open replay editor> confirm the trim> advanced to mess with key frames, choose the option 'free' because it's set to 'orbit' by default. It works when you set the keyframe to it.