try to search for "garet122" on the forum
I don't remember exactly if it was him commented on the channel that I have debated on, but the both of them communicated between them, so I termed them as a group.
I've seen the video before, and in it a doctor from Thailand publicly announced his syahada. The doctor was responsible for studying the verse about human flesh being burnt in hell, where the skin will be repaired as new everytime the flesh is burnt. The reason for his conversion was that the verse was spot on with his knowledge, that pain receptors are all located within the skin.