@sjw @matrix the answer we're going to get is slightly dodgy black letters of the law and generally reasonable outcomes through the operation of the legal system, because any attempt at perfect law would get exploited. If it were legal for children to send nudes to other children, then children would be groomed into sending nudes to children on monitored networks, etc. If it were legal for videos to have naked children if it's in a non-sexual context, then such videos will be made with the secret purpose of helping others to chop it up to to make a sexual video out of it.
Out of everything rotting in the US, the court system is not that bad. They tend not to get fooled by CP 'researchers' and I bet most people posting a zoom video like this one won't get screwed. There's a risk, but you can also go to jail for a crime you had nothing to do with at all.
But, "what if a pedo likes it?!" is a really bad test and I hope that doesn't get more popular because pretty soon it would be illegal to have Yellow Fever.