TL;DW: Jeranism saw something that's definitely the same shape as the ISS, but he can neither explain what it is nor how whatever it is up there works.
It looks like a duck, it swims like a duck, it quacks like a duck, so it probably is a duck.
It looks like the ISS, moves like the ISS, and turns in the sky relative to the observer like the ISS, so it probably is the ISS.
He then babbles on about all sorts of reasons he personally doesn't believe anything, and why he thinks everything involved with it is "A complete and total joke" with his entire argument essentially being an argument from incredulity. Par for the course of those who subscribe to the space conspiracy hypothesis.
Typical. Jeranism resorts to blatant denial. Why does he keep refusing reality? Don't flat earthers, especially him, love to go on about "personal experience and first-hand observation" as evidence? Well, he observed the ISS himself, with his own eyes. What's his deal?