Hi tomplum
In your latest video the one doing the circling is a male. The one being circled is possibly a female, but if it is she is not impressed by him.
No it would not be necessary in any event to have to handle the hedgehog and never a good idea unless it was absolutely necessary. Also how would it benefit the hedgehog, by you putting food colour dye on it? I see no need to interact with wild hedgehogs unless it is for the benefit of that hedgehog or hedgehogs as a whole. They should be allowed to get on with their lives in peace.
But, it is possible to learn to identify hedgehogs by their natural markings. The following is a link giving a few tips to help with natural identification. https://www.hedgehogstreet.org/forums/topic/identifying-hedgehogs-from-their-natural-markings/
