Yeah I know it's a Sky channel and promoting such a channel does annoy me a little but it's one of the few channels worth watching on Satellite/Cable (U.K only as far as i know).
They have put up some great music docs and concerts, usually around the 9 P.M mark.
Recent views were:
The History of the Clash
Talk Talk live concert 1986
The Specials 30th anniversary tour concert
A Kaleidoscope Dream ( Pink Floyd and others in the late 60's)
The programmes have no ad breaks and are almost always decent docs with band members involved. You also get arthouse movies in their entirety too.
Sky Arts