Hello
I do not know if it is normal in your digital speedometers, but in mine when I go at night by road from the movement of the car I can see how there is a slight movement on the digital screen.
The video that I have included has been recorded standing in a dark parking lot with the lights on although very little is appreciated live, it shows a lot more, if you look in the right part where the right circle and the limit of the digital picture you can see how it moves .
I make sudden movements so that the speedometer moves.
Is it normal? Does it happen to someone else? Can you try it?
Google traslator used, Sorry.