but i didn’t notice anything specifically transphobic about it.

It might not sound transphobic to the uneducated, but many points she peddled in that video (esp. the Rapid Onset Gender Dysphoria stuff) and used by transphobic groups to discredit trans people. There is a very good video (not related to Sabine) that explains all this stuff:

www.youtube.com/watch?v=JiOc0r31-Os

Be warned, it’s 5 hours long. (Yes, there is a lot to explain, and there is a lot of bad stuff there.)