The name is "One Cut Checker". Without editing GameObject or Scene, you can rewind the game from the editor or loop one cut.
As other functions, pause and next frame often used during operation check are registered as shortcut keys.
These are also registered with the Unity standard, but for example it was necessary to enter "Ctrl + Shift + P" to pause. In one hand the majority of people are holding the mouse, so it is very hard to enter it with the other hand.
So, "One Cut Checker" makes it possible to enter with 1 key.
Please double click on the package that can be downloaded from the link below and import it to Unity.
https://github.com/yukiringo/OneCutChecker/raw/master/one_cut_checker.unitypackage
Window -> One Cut Checker
Place the displayed Window in a place you like and play the game (place anywhere you like, but it must be displayed at all times).
From the place you want to check the operation, press the "→" key to use the shortcut key, if not press the next frame button (Step button). Frame is recorded by this operation.
It can be rewound or looped by frame feed multiple times.