Help me find old video clip

I remember this as being on the first video clip that was ever on TV, but I might be wrong about that. Would be at least twenty years ago…

It was two very young Japanese children, a boy and a girl, and the boy was a little older than the girl. They are walking along on this bench or ledge just above the ground and they come to a gap that prevents them from continuing. So the boy uses his body as a bridge and the girl walks across them.

I can’t find it. Anybody happen to know it? Thanks