He is an INFJ. Look at his left fiqures when he says ''I was playing guitar'' 0:35 It's just how he colors his words with facial expressions and body gestures as if the wanted to show how he was doing it. Yeah and also those ''umm, uhum, yeah (0:53 to 1:00) is Fe when it connects with people (+ Fe smile at 0.14)" I'm lazy type his other reasons....
I found him difficult to type. My best guess is FiNe. I thought at first he had Ti wrists considering how soft and floppy they were, but that forced me to recalibrate my concept for Ti wrists and I realized there was little to no Ti precision in his wrists / hands, they moved in a disjointed manner from his speech which is typical of Fi(my guess because gesticulations in an Fi are an expression of an Fi's feeling, rather than an additional communication medium used by Fe, in which case the gesticulations would be more tailored to the viewer). I also put Fi as his lead because he seems to default to the Ji disengage down whenever the pressure to extravert is lifted. He also has rapid eye toggling unlike seeing in an Ni so I think that's out. FiNe.
"It is the theory that decides what we can observe" -Einstein