I discovered the site for Austin City Limits Concert Series recently. You can watch a complete live concert on You Tube from the music centre of the universe !
Just type in Austin City Limits Concerts on You Tube and enjoy !
Some very recent concerts featured are - Arcade Fire, Coldplay, Randy Newman, Florence + Machine and Wilco !
However the concerts expire ( I think in two weeks,,,I'd be guessing) so they are not there forever ! Then a new concert series starts !