Well.....
It is a JW belief and, in this case, it's put in simple terms for a child to understand.
At the beginning of the video the mother mentioned that people have different ideas on what's right and wrong, then proceeded to explain very tactfully the JW belief.
JWs don't hate on others, but definitely the homosexual lifestyle is not at this time part of the culture; and the same way perhaps gun nuts or a radical right wingers or a racists indoctrinate their offspring, JWs do the very same on their ways.
Actually, for JW children, this needs to be emphasized more and more these days where the homosexual lifestyle has become the norm in so many places, so much so that the Law of the land is ruling in favor.
I feel so sorry for people whom I'm sure are born this way, but it's a JW belief and they must teach it to their young.
It is what it is.
DY