Squirrel
This is really quite common, I don’t know why. I’ve come across this a few times, the girl refusing to speak in a video, some of them will eat their guys ass and suck ballsdeep but are too shy to utter a word.
In her case I understand even less, since she appears to be a native speaker of English so there wouldn’t be the issue of screwing something up with grammar etc. (like I do).