Well thank you 
I can try but I don’t know if it’s possible, I was filming with my tablet and I put it very close to the guitar’s sound hole to try to get a good sound record.
The positioning of the guitar depends on where I’m, the living room is different from my bedroom. But I can anticipate that the guitar rest comfortably on my right leg since I am right-handed. Sometimes I lift my leg and somethings I don’t. In my bed I sit completely differently. Justin doesn’t teach that you need to lift your leg, but he does it in the videos (I can’t tell if it’s on all of his videos or just on some of them, but I definitely have seen he doing it). In the classic course, if I remember correctly, he taught to put books under your leg (feet) to lift it. I think he deleted that video. So I’m kinda discovering this by myself.
I’m also practicing to keep my right arm, hand and shoulder to be relaxed and I’m trying to not hit the body of the guitar with my strums, it’s kinda hard. My guitar doesn’t have pickguard. But as far as I know, even with pickguard we should try to not hit the guitar’s body. @LadyOfTheCastle Strumming Mechanics - #45 by LadyOfTheCastle told me I while ago to not hit the guitar’s body in one of my questions, I don’t know if it applies when having a pickguard, I think it does.
Cheers!