Personal opinion:

Man is interested in woman (Heterosexuality)

Man is interested in man (Homosexuality)

Man is interested in both (Bisexuality).

I decided to start with these definitions, well, I saw the video and the girl seemed quite attractive to me and since I am heterosexual, that would support the hypothesis that she was discriminated against because of her gender identity, but let's be realistic.

If the guy who rejected her identifies as heterosexual, it is understandable that he is not attracted to someone who is biologically male. It is not fair to label him as discriminatory or call him transphobic if he simply is not attracted to trans people.

For example, I am heterosexual and I was attracted to her while being aware of her biological gender, and that does not make me homosexual or bisexual since I am only attracted to women.

What happens here is that (at least to her), I also perceive her as a woman but aware that she is not Biologically, I am not deceived, she did not make me believe that she is a woman by birth, and that is the key issue.

Yes, openly declaring that she is trans, that she was born male (and may still have a male organ) may exponentially reduce her suitors, but only those who are truly interested in her, not just her physical appearance, will remain, those who seek to understand and support her.

And I am not going to tell you that heterosexuals are not interested in trans people because it is a lie, according to Pornhub, the fifth most searched category by heterosexuals is trans.

Still, we are not obligated to engage in relationships with trans women, we are obligated to tolerate, respect, and consider them as any other human being.

The foundation for a beautiful, healthy, and stable relationship is love, but also sex and honesty (communication).

Imagine (in a sexual scenario) that your trans girlfriend still has a penis, that you are both active (penetrating) and won't be passive (penetrated), there are options like oral sex and mutual masturbation, it can be managed of course, but it's not the same.

So, I think it's important for trans people to be honest about their gender identity from the beginning. There is no need to hide or deceive others, that will only lead to rejection and misunderstandings.

Maybe I am being ignorant and I apologize, I have never been with a trans girl although I don't deny the possibility, as I mentioned, the girl in the video was attractive to me.