I've long stopped watching her videos, as I found the repetitive format very frustrating/boring. It's always: start video with a comment about the camera/lighting/her appearance (usually her hair), time lapses of her tutoring/learning German/cooking, talk about her bland af food choices, and then some mention of her pets (and the way she says the family dogs' names grates on me). That's it.
Her flip-flopping about what she wanted to do in the future was the last straw for me: medicine, then teaching (?!), then nutrition (including her obsession with studying abroad), and now cancer research. I just can't with it all. From someone who's doing a PhD right now: jumping into something for the sake of it, and without knowing what something fully entails is just asking for trouble later down the line. You should only go into MA/MSc/PhD level study if you are pretty certain about the field you are passion about. If you aren't, it's a huge waste of time, money, and energy that only privileged people can 'write off'.