The vast majority of cameras are privately owned. Businesses, cars even residential doorbells are watching quiet streets these days.
It has reached the point where you can't get 100m from home without being on camera. One in four cars that pass you have a dashcam. One in two houses (that seems crazy-high - not sure I can trust Google on that one) have cameras watching the front yard/street. Any of their owners can choose to upload footage of you to the Internet for whatever reason they like.
It gets murky with what goes on inside shops. They're allowed to film you, but they may not be allowed to just upload that footage to the Internet. But their employees absolutely call out "interesting" footage to one another. "Check out this crazy kid's antics" or "Look at what this man/woman is wearing/doing". Should they? Probably not. Catching them at it and calling them out is not easy, though. And they'll probably just claim it as "training" or similar.