TN and La Viola broadcasted many concerts,the songs that are shown are not chosen at random,the bands(or the producers or whatever)let them show some parts for some reason(in this case could be an offcial release who knows?)I remember watching the program and they showed one concert(I can't remember the band)and they said that the band only permitted 2 songs not in a complete form to be shown.They surely have the whole show but they are not authorized(may be by QP)to show it completely.