Yep, I would consider myself INTP in MBTI, and actually was influenced by auxilary Ne development posts to a great degree before I jumped into Socionics (I've spent roughly 4 years actively into MBTI, with cognitive function/function stack knowledge, before I jumped into Socionics) and that is a fair assesment, I would say. More Ti heavy INTPs indeed come off more like SLIs, though can see ILI to a lesser degree as well.
That sounds fitting with Fe PoLR, I would say? Seeing making videos about the game on the youtube/twitch as something more of fake reactions, which there are definitely a lot of to be fair, though you might be just referring to your general temperament and how well it would hold for an "entertaining" video, which I would likely suck at if I was being genuine or even if I tried to be fake as well, so a fair point, I suppose.
And it is a bit more of flexibility via self-imposed rigidity, to be more precise. Tying in with your last paragraph, for example, there are times I can be fairly "late" at things, but key point is that, I tend to judge what I can get away with and what I can not. For example, if the teacher of an early morning class is someone who is rather a stickler for students showing up on time, I will prepare as accordingly so that I won't be on bad terms with that teacher to not be left on their mercy when it comes to end of the semester if I pass or fail, but for more relaxed teachers, I might not really mind as much that I was late, though try to keep how much I push the boundaries of what I can get away with to a reasonable level, so that I still have control over general end result to some degree/likelier to not end up in the worst case scenario, even if I already have "if the worst case happens, I can just X and/or Y and it will be still okay" mentality to keep pressure of expectation/need for certain success low.
Ie. I spent my entire high school years in a careful balance of listening the class to the extent I needed and then doing whatever I felt like, while not giving the teachers opening in any area by being able to answer what they asked since I kept an ear on the subject and getting good grades and keeping civil while interacting with them, added to being completely frank with my parents about all of it, so they really didn't have any ammo to impose on my personal freedom no matter how much it pissed them off. It is self imposed rules and rigidity by taking into account what is the bare minumum necessary in any situation to be able to make a rational and sensible sounding argument against someone if they try to impose on your freedom, it is still connected to Alpha "expecting that if you can give a sufficient enough reasoning for your actions in a socially acceptable and/or tolerable way(Fe/Ti), then you can not be publically shamed or attacked for people would rise to defend you and you can defend yourself with your words(Ni/Se devaluing)" with ignoring/being blind to Se based possibility of actually being attacked physically or socially. Ne is mostly a part of it in "If that fails, I can just go with the next best option, it is okay." rationalization process, if that makes sense?
So there is a strategy involved, with a core rigid structure at the start, yet depending to circumstances, can change direction wildly if situation calls for it?