they are revictimized every time someone sees it

That's why they won't even show it to the jury--they have to rely on an expert opinion. People still wondered how it could revictimize them if they don't even know someone has watched it. So they fixed that--they send them an official notice of their new revictimization every time someone is arrested in possession of it. So their revictimization is complete. But don't dare show it to a jury, who might observe that it's just boys having some naughty fun between themselves. Engaging in mutual abuse, I mean.