Shopping channels are an absolute mystery to me. I can't understand why anybody would watch product promotions and then phone up, credit card in hand. And Yet....QVC is going from strength to strength and makes massive profits.
The idea of a Shopping Channel for younger people sounds like a smart idea on the surface - you could sell all kinds of gadgets related to mobile phones, media players, sportsware. Unless your channel is very well established I would be cautious to compete with QVC though. They only have to start up a "QVC Junior" and they would wipe you off the planet.
Good luck with it anyway!