Sia's Chandelier Video: Is it sexual?

So there was a big controversy about Sia's video Elastic Heart involving both child dancer Maddie Zeigler, and actor Shia LaBeouf. But I showed a few friends of mine th Chandelier video (watch it if you haven't) yesterday and they said it was disgusting and too sexual for a child. I don't understand what about this video is sexual. It really aggravates me for someone to say that because I don't see what's sexual about it at all. They were angry at me when I told them they were sexualizing the little girl. So I would like outside opinions. Thank you.