'RaM,' After examining the shot in question, have found that it appears to be just an image reflecting shift that has bounced and moves in parallel across the shots pan in the video, with the effect of reflected light from the sign board - as illustrated below:Noticed this watching the British Superbike Round at Donington Park last night,
View attachment 28875
View attachment 28876
You can watch the coverage here look at 56:41