I just watched the video you referenced and all I can say is THANK YOU, THANK YOU. It was extremely informative and thought provoking.
While I am not a biologist and can not argue his data, this video brought up points that I had never considered. I don't agree with all his conclusions as I find some to be a leap of logic, but that could be due more to the limitations of video and time constraints. I also don't think comparing humans to other animals is that relevant as each species evolved differently to handle different challenges.
The major problem I have the presentation is that his whole premise is that there are exceptions so therefore there are no rules. I find this rather simplistic.
That would be like saying that because somebody is born with 4 legs then humans are quadrupeds. An exception, but not the rule.
I have no doubt that there are hundreds of variations that many millions of us collectively carry, but the question is if any of those individual variations are consequential. If there is a variation that would blur the lines between male and female that, say, 15% of males and/or females carried then we'd be on a path to saying biological sex is not a dichotomy and is non-binary.
Similarly, if there are several variations and less than 1% of males and/or females carry any one of them then no. Those variations do not define our sex. They are inconsequential exceptions. I really don't know which is correct, but it is something to think about.
However, I now question if basing the sex of a person only on an XX or XY chromosome pair is sufficient to determine sex, or may there be other factors that might need to be considered. I am going to leave that up to the scientists. In the meantime, I will have to stay with the consensus that X and Y chromosomes play the major role in determining sex until the consensus changes.
In any case, this is a video well worth watching and again thank you for bringing it to my attention.