So's a video game, and we call that "real-time 3D". Time is mentioned, but it isn't counted again as a dimension, perhaps because any given momentary view is a time slice, not a time range like it is an XYZ range.

I think the difference is that in a video game you are in one location only at any given moment and things travel only forward in time. We can view from any location at any time in volumetric video.

Some games absolutely yet you do that. It's not a limitation of the medium.

I'm curious what are a few examples? I've missed the last decade of new games largely.

CS:GO, TF2, GTA5 and Trackmania (and likely many more) have replay systems where you can pause, play and rewind with a freefly camera. Lots of games have a rewind mechanic: Grid, Baba is You & Viewfinder come to mind. Others have a "Photo Mode" where you can pause with a freefly camera: Starfield & Witcher 3 come to mind.

Talking about rewind mechanic in games, you can't possibly leave out Braid.

https://store.steampowered.com/app/26800/Braid/

Valid, yeah. It occurs to me though that the difference is we are making a representation of the real world that can be manipulated like such, as opposed to a simulation of a fabricated world.

Not a freefly cam but, this was 1989 after all: https://en.wikipedia.org/wiki/Indianapolis_500:_The_Simulati...

Unless it’s a cyberpunk 2077 brain dance in the editor

In a lot of racing simulators you can change the position of the "virtual camera". It can be in the cockpit, on the hood, behind the car and on some games in an arbitrary position. Usually replays allows you to see from other competitors and where TV cameras would seat in real world.