In this example, it's obvious that the vehicle's not moving.
My comment is a general comment related to GPS stamps on dashcam footage. Here's a scenario:
-The speed limit is 50 km/h, and you're doing 50.
-The GPS isn't the world's most-accurate, and it's stamped on the video showing you doing 52.
-Somebody cuts you off and you rear-end them.
-The video's pretty clear that they were in the wrong, so you present it as evidence...
Option A) evidence to the police:
-Officer notices 52 km/h, says you were speeding, writes this in the police report. Officially, speed contributed to the crash, and this makes you partially liable.
Option B) evidence to your insurance company:
-Your insurance company passes it on to the other party's insurance.
-Other party points out that you were speeding, says you must share the liability.
Now you either have to accept some of the liability from the crash, or you have to go to court, and argue that the evidence that you provided is inaccurate... Somehow you've got to prove that your GPS data was wrong.
Or imagine the same scenario, but you're doing 55 km/h, keeping up with the flow of traffic. And your GPS is actually accurate, showing 55, so you won't be able to prove the GPS wrong. So you'd need to prove that you're speeding in a "normal and safe" manner. You will probably not win this argument in court, and you will have to accept some of the liability. Due to evidence that you presented. I'd rather not present that evidence at all-- it makes it too easy for the other party to push part of the blame onto you.