Does tint affect dash cams?
In many ways, tints on vehicles will have a comparable effect as sunglasses. During the day it may reduce glare but won't compromise video quality at all. At night however, tints do tend to restrict how much light gets through to the sensor thus there will be less detail picked up by the camera.
What you can expect is a slight degradation in night time video quality although glare might be better managed. Ultimately, many of our customers and ourselves included, are using rear-facing dashcams with tinted windows without any issues and are happy with the great deal of additional evidence provided by a rear unit.