This is a lot of information and Sans is aware it's gotta be even more confusing for KV, who doesn't even know most of these people, but they are doing some sort of meta-magical exploratory brain surgery right now, so Sans will say "we'll have to fill you in on who some of those guys are later".

Sayori looks pretty alarmed at how candlenights.vid plays out, and looks like she's antsy to explain, but she reluctantly agrees that Sans has a point. It's not the best time to elaborate. Still, she says, "I guess whoever the administrator is thought it was important for us to see those..."

There's one more thing to check before finishing up, since that last file seems quite insistent on it being the last thing looked at--before they touch that file, Sans is going to tell KV about the file in their .person folder called "role_develop_island.exe". Does that mean anything to them? Sans maybe has a guess but KV knows themself best, so it's easier to just ask.