He clearly states that he was reading an article, he uses past tense verbs when referring to Ross, and to the events spelled out in the article. If you somehow thought that he could be reading an article that ostensibly has to be describing a past event as he was seeing it in real time that is a logic flaw on you.
It has nothing to do with what you can or cannot visualize. All you have to do is ask yourself could he have been reading an article about Ross’s arrest while watching it? Since nobody can violate the causality of space time the answer is no.
This isn’t just you this is everybody in this thread who is reading this and going this is a little confusing. No it’s very clearly him speaking about a past experience reading an article about a past event.