The grandma’s remark in the video about loving her if she turned out to be “homosexual or transgender” is troublesome. Grandma didn’t have to say that. What does the average grandma know about “transgender”. Just sounded like an odd statement to make.
Aha, there it is. This school is in my town, and I saw the local news report, so I didn't go to the link, assuming it would be the same one I saw. It isn't. In the initial interview, the grandmother didn't go there.
That statement probably sums up the problem.