Males receive Y chromosome from father and pass it down to next generation males. Females Receive x from fathers and mothers and pass them down to both sons and daughters. Men can know there they are from but not women.
I am surprised that you didn't finish watching 羋月傳. I did enjoy watching it as a few people who commented it below. (Please excuse me for my comment in English because my poor Pinyin as I am watching your video on my computer and not on a mobile devise.)