Looks like the game DVR on series X has not been improve from the Xbox One.
Xbox game DVR compared to the PlayStation is total garage.
Was really hoping for an update to improve it. Fingers crossed there working on it.
I don't have an Xbox One but I thought it was supposed to be even better than the PS4? If you plug in an external HDD, you can record two hours of 4K footage in a single file, can't you?