Remarkable in what way? Sounds completely unremarkable to me.

Oh wow, someone did a dance, and then someone copied it, and then someone copied it, and then someone copied it, and then..

It's remarkable in how hive mind works I guess. It's mindless pablum to the nth degree. The thing I find remarkable is how it shows how easy it is to influence someone. The psychology PhDs that the Chinese hired earned their money to be sure. TikTok has to be the most well funded psychology study ever implemented to the point that the users don't even know they are test subjects