NIRVANA ON VEVO: Marking the 20th anniversary of Nirvana’s Nevermind, VEVO will air an exclusive, commercial-free 24-hour on-demand showing of the band’s 1991 concert, Live at Paramount. The high definition concert can be seen on-demand in most countries around the globe at VEVO, YouYube and VEVO Mobile tomorrow beginning at 12 Noon ET/5 p.m. GMT. A 24-hour encore will air Monday, Oct. 31, the actual 20th anniversary of the concert. VEVO’s 24-hour offering marks the first time portions of the concert, shot Oct. 31, 1991 at Seattle’s Paramount Theatre, will be shown online. Live at Paramount is the only known Nirvana concert shot to film. Here’s a clip of “Breed” from the show currently available on line at VEVO. (9/26p)