When I was a kid, I remember watching a TV series about a boy, who could see ghosts through his video camera. He became friends with one of the ghosts, a little girl, and there was a scene of both of them on a carousel together I think? The little girl's caregiver/mother abused her, and I think the boy and his family or friends were trying to find ways to put the little girl ghost to rest.
I've desperately tried finding this but haven't found anything close :(.
edit; It was a british childrens tv show, live action, and I watched it around 2004 I imagine? it was set in a modern era but the the girl ghost was from an older era, maybe victorian. i really cant remember anything else than that though