Well, someone doesn't have to be Catholic to genuinely see Hell. In fact, non-Catholics will see it. I just question whether these experiences are legitimate in general because none of the many I've seen result in ultimate conversion. I supposed God could allow it for the benefit of others even if not for the individual who experienced it.
I think the bolded is pretty spot on, I think it could still work towards this man's salvation but he needs to get out of his prot mindset. If he did study Catholic stuff on Hell I think he would be trying to be Catholic and not in his false sect.
That was perhaps the biggest issue I had with the video and why I mentioned it earlier in the thread. I looked this guy up he has his own 'ministry' and website... He seems presumptuous, a typical protestant mindset. I hope that he be converted 
I do think it could still be sincere but he saw things in his limited intellect and tried to process it the best he could. God could have allowed the demons to look like they were having fun torturing people to get the idea across that they are not your friends. The demons can feel no pleasure or happiness in anything they do.
What I didn't buy was what he was saying happened to a woman fornicator. He looked like he had dupers delight telling that story or that he had some weird pleasure in seeing that.
But yeah, the man needs prayers, I said a few for him already and maybe he has a known e-mail or something that I (or one of us) can reach out to him more directly. Wouldn't hurt to try.