Largely yes, but then the pianist did approach and have them specifically filmed
I think the Chinese didn't move because they were recording something and wanted to do it in that place, but most of all they wanted what had already been recorded of them to be deleted / blurred.
Sure it's a little ironic if they were recording themselves, but in many countries you expect it to be a right to have recordings of you at least not distributed (and it is ironic for PRC people to talk about rights).
I think the Chinese didn't move because they were recording something and wanted to do it in that place, but most of all they wanted what had already been recorded of them to be deleted / blurred.
Sure it's a little ironic if they were recording themselves, but in many countries you expect it to be a right to have recordings of you at least not distributed (and it is ironic for PRC people to talk about rights).