Why does it need to be real- time? If rv is possible then it’s naive to assume that time is somehow “special” vs 3D. It’s possible that time is not unfolding linearly, that is only an illusion. “Remote” could involve accessing information from along the time dimension.
Long ago I was told of looking at a timeline so that time "travels" from left to right is the normal view, but now rotate that timeline so that it appears as a dot to you. You now see all events of the timeline, but without reference to "when" they happened. Lots of scifi plots are also described as such
Think about a maze drawn on a piece of paper. Because we’re in 3D you can see all of the maze at once but if you were a 2D entity inside the maze you would only see the walls / entrances / exits directly in front or behind you. Now imagine drawing a line from the entrance to the exit - that’s 2D + a time dimension. Now make it a 3D maze and an entity existing outside of spacetime would be able to see all events happening at once in 3D.
