I've listened to your recording a couple of times, and you're absolutely right in the assessment you make in the video. But I think you have everything you need to stop people from misgendering you: I think all you need to do is to get rid of some old habits.
From what I could hear, it sounds like you're more likely to get misgendered if you're excitable and speaking quickly... because when you're nervous or excitable you speak in your throat rather than your chest, so the higher-pitched elements of your voice tend to dominate. If you slow down, relax and concentrate on producing the resonance you get when you speak with your chest rather than your throat, your voice passes perfectly. In fact, it does this at several points in the video, once you've overcome the nerves (e.g. from about 40 seconds in). So I'd recommend slowing down your speech and trying to sound... how can I put this?... perhaps a little more bored when you're speaking.
Listen to the end of the video, the bit where you say you'd be very grateful etc. That's a 100% pass for me, and you reached it when you were calm, relaxed and speaking more slowly. So clearly, you do have a voice that can pass. Obviously you were more nervous and excitable at the beginning at the video, and it is this that caused me to misgender your voice (even though I knew better).
Would it help if you put up a recording in Dutch too, so that we can assess whether there's a difference? I've always found it makes me speak more slowly and deeply because of the structure of the language.
