I think what you're describing is the BBC filler/logo thing (not sure what they're officially called) - the little bit of film they play to fill the gap between programmes.
Currently it's things going round in circles, but a few years ago it had a dance theme - there were various ones including people doing the tango, a couple of blokes doing some weird stretching on a rooftop, and a crowd of people jumping up and down in slow motion at a festival or rave.
I have no idea what the music was but I'm pretty sure it would have been written specifically for that bit film by the BBC or someone they comissioned.