With schizophrenics I've been around, they're cool the majority of the time but then they'll randomly hear voices and go completely off the wall with crazy shit like people are going to kill them, aliens, government spies, they need to hide in a bunker, etc... and it's very obvious that they're hearing voices or something that spooks them.
Lucas has never seemed that way to me, but he may be able to control himself for short videos or 2 hour interviews. He'll go from calm to angry instantly, but it's always based on the same stupid shit he believes, not like he's hearing voices.
My guess is Lucas is more delusional based on some traumas he's had, and possibly that he's really gay and hung up on that. It's clear Lucas was a fat loser in his formative years. There's the stories we've heard about his roommates who were sex havers and Lucas cried about that. For some reason in these experiences, it stuck in his head that everyone he was around was having sex and sharing fuck buddies with each other. Maybe that actually happened in his youth, or he assumed that after hearing others fucking similar to Elliot Rodger going on for pages about his sister fucking.
It's also possible, especially if he's actually autistic (and I'd be very surprised if he's
not as his behavior is more hallmark high functioning autistic than it is schizophrenic, doubly so because he has very strong fixations on really obscure, weird shit, and when he latches onto an idea it's IMPOSSIBLE to get him to change on it), that they're scenarios he makes up in his head that have become part of his fixations.
I've been told before that people get weirded out around me as I look like I'm having a conversation only I can hear, even though I'm not saying anything out loud, and they're usually right; I play out How To Not Look Like I'm Autistic When Doing Social Interaction in my head and apparently sometimes make facial expressions or eye movements that you'd normally see in a conversation. I'm not hearing voices, that aren't my own, but I am 'talking' to someone nobody else can see or hear because there's not a person there. If I think I'm alone I definitely talk/think out loud to myself regularly and sometimes it turns out I'm not as alone as I thought I was when someone else asks who the fuck I'm talking to or what I'm doing; mercifully if I have a phone out they tend to just assume I'm recording something and leave me alone.
The guys I work with have become
long since used to hearing me just chatter away to an electronic thing that isn't behaving the way it should. or to sets of tools and know it's just either me thinking out loud (which works really well for me for figuring out something that's not an obvious problem/solution) or that I THINK I'm chattering away in my head when I'm not and any time I switch jobs I usually warn the people I'll be working closely with that this is a thing I do and I'm not always aware of it so feel free to tell me to stop talking out loud if it's annoying as I don't always realize I'm talking out loud.
Hell, people who get to spend time around me offline are used to hearing the regular question of, "Hey, did I tell/ask you about $Topic, or did I have that conversation in my head only?" because I...just...practice conversations before I have them and sometimes forget if I've actually had them or not.
I know a few other autistic people who do that too; they're not really seeing or hearing someone that's not there, they're running through either past social scenarios in the "wish this is what I'd have said" or "what should have happened as far as I'm concerned" sort of way or they're practicing, for lack of a better word; problem is, it makes one look more than a bit mental if other people see you doing it and don't know that's a thing that sometimes happens. They'll also occasionally have an argument in their head and not remember if it was an argument they had with an actual other person or just a made up one they had in their head. Decades ago when I as still in high school that was legit how I prepped for debate tournaments, I'd just imagine what the other person was going to say as their argument so I could have multiple replies on deck mentally. One of the made up arguments was likely to be close enough to what actually ended up happening that I could use my practiced response.
Some days I'm better at playing How To Not Look Like I'm Autistic When Doing Social Interaction and some days I come off as a complete basket case to people who don't know me or don't know me well.
That aside, I don't think Lucas is 100% straight at all; he's way,
way too focused on cock and anal sex and other guys being gay and attracted to him to be a gold star hetero.