Hello.
The brightness of the display looks ok to me. Do you think there is a problem?
rFactor updates the lap time only twice every second. so what you see in the video is expected.
For that reason when I play rFactor I display the lap time in the form M.ss (minute and seconds. no fractions of second). it looks better.
The game in my video instead, is GTR2.
Regards
Cristiano