Playback of the dash cam video seems to speed up or slow down in no particular pattern.
Last Updated: January 03, 2018
Under the Settings Menu (accessible by pressing the M button), you will find the MOTION DETECTION option. Enabling this causes loop recording to pause when your vehicle is at a complete stand-still to avoid recording when you are waiting at a railroad crossing, for example. This may result in the video to appear odd when played back. Disabling the motion detection option will eliminate the pauses.