I can also only conclude it must be real.
It doesn't make sense if it would be faked, they would have to carefully edit a couple of random blinks into the videos.
Why only her and why do it in such a way it's barely visible.
I have been searching older videos on that youtube channel to see if I could find her doing it, but I could not find anything so far.
The first videos do look scripted and edited, with parts of the conversations cut out, or maybe even redone.
Gave me the idea that possibly they tried to hide her reptilian blinks in the beginning to keep her true identity safe.
And Boris Johnson is one too.