I think he knows he's not at any risk. All he has done is what amounts to filing a complaint that some people said defamatory things. I am betting that he doesn't mention any of the true things said about him, since that would be risky for reasons you pointed out (he is on video admitting to crimes). He is probably accusing them of making allegations of CSA. He knows that the court will not pursue the case, since it is outside of their jurisdiction. They will throw it out, and he will say the justice system failed him (he has already griped about how slow his lawyers and the court have been in dealing with the case).
Once that happens, he will have around two years where he can threaten to file a civil suit before he actually has to do so. He will either file another sham suit, or he will make some excuse about why it makes no sense to do so, even though he promised Kim he would never stop pursuing it. He can only put the inevitable off for so long.