Yep, she's clearly a Gamma. Plus, she's got a flexible posture, and her eyes seem to lead the head every time they move, so she's definitely a P-lead. I only skimmed through the videos, so I'm not completely sure of her leading function, but in the first video (where she was younger) her general demeanor is that of a Pi-lead, so I'd say she's NiTe.
Yes, NiTe fits perfectly! I also noticed lots of zone outs during that earlier video, and her direct nature was screaming "gamma, comin' atcha" to me. Thank you for your input, Calin.