Other exJW's reported this to the authorities in the UK in 2017 who advised if the victims do not come forward and he is out the country they cannot do anything. The Croatian authorities said if the crime occurred in the UK it is up to the UK law to act so nothing came of it.
If true, that would explain the phrase he used in the video, something along the lines of "we had to leave the UK". Was it to escape consequences? To fall through the cracks? Unlikely that any country would extradite someone simply for an investigation, especially without anyone coming forward.
We left the UK. We never say we "had" to - we say we chose to / wanted to / decided to.
Was the WTS involvement in allowing and / or enabling this the thing he thought he had over them? Literally, their involvement in covering up his own behavior? That would be something eh? Incredibly brazen ... but then look at how shameless and unapologetic he is now.