For anyone worried, it's likely more because you don't actually know this lecturer and his credentials enough to trust him. I advise you actually look up the study for yourself. No one quite expected the results they got and in terms of consistency it was quite shockingly on point
I think we can get caught up in the "are you trans enough" boat but the study shows that most trans individuals will show these results and if they don't, well yeah, then it is more likely psychological, and what's wrong with that? Panic attacks aren't physiological but they're taken seriously. Panic attacks can be like cardiac events or asthma attacks. The latter are physiological but to the person suffering from one of the 3, whether it's physiological or psychological doesn't matter.
If more knew of these kinds of studies and their results, they'd likely be more empathetic but many are shut off to this kind of knowledge or frankly just unaware. It's taken studies such as this and medical practitioner pressure to get procedures and treatments covered by insurance or national health plans because the public sure as hell aren't wanting it by and large. There's very little empathy by the everyday public that we have to wait forever or pay out of pocket for life affirming treatment.
It's not worth seeing something like this and getting worried. That study was only positive for us. It's better to see the positive than find the negative. Sure, it may only apply to people who are, say around 50% binary or more (though I'd doubt that to be honest). Who knows? But for me, I watch that video or read the initial studies and see the positive. That this is not because my state of mind is in question, but because my brain developed in such a way that contradicted my assigned birth sex. I have the utmost empathy for those with legit mental conditions, but I find it insulting to have people assume that's what I have, not because having a mental condition is something to be ashamed about, but I feel it degrades the true nature of what I go through. That my issues are purely a fault in my mentality and not the reality I feel in that there is nothing wrong with my psychologically, this was essentially just a birth defect. The latter more suggests a need rather than a desire to transition while the former suggests that therapy alone could well "cure" me to accept my "true" gender, and this is the view many in the ignorant public have. I haven't had any mental health issues in my life thus far. There's never been an issue there, and hopefully never will. However, most of the public would consider otherwise and to me, that's just a wrong assessment. The wrong idea.