That sensor has been used in the past and I have read a long interview with
Christian Loriaux
In it he said that the data gathered when testing on asphalt was fantastic "because the drivers cannot tell us" much useful.
However he went on to say that it was essentially useless on gravel where to paraphrase "too much is going on and drivers can "correct" for so many quirks" or "drive around" problems..
That car do not look to be going particularly vigorously....driver? or car?
Who can say?