Two videos from Nirvana's 'Live at the Paramount' concert film have surfaced online, and we'd be remiss in our duties if we didn't insist that you watch them immediately (below). The songs 'Breed' and 'Territorial Pissings' were part of Nirvana's Halloween night 1991 performance in their hometown of Seattle, and much of the concert will be will be simulcast tonight on VH1, VH1 Classic and Palladia at 11 PM ET/PT.

The previously unseen ‘Nirvana: Live at the Paramount’ is being shown in conjunction with the 20th anniversary of the release of the band's watershed 'Nevermind' album, which originally was released on Sept. 24, 1991. The 19-song set captured the grunge greats just as they were gaining national attention, showcasing their muscular live attack and penchant for blowing the proverbial mind.

“The historic and riveting concert will remind viewers how one band changed the music scene with an inspirational bounty of seminal songs,” reads a press release.

Nirvana also are celebrating 20 years of 'Nevermind' with a deluxe version of the album that drops Tuesday (Sept. 27). Three tracks from that set -- a version of ‘Breed/Immodium’ recorded at Smart Studios, a boombox demo of ‘On a Plain’ and a live version of ‘Smells Like Teen Spirit’ recorded at the Paramount show -- currently are streaming online here.

Nirvana Rock Out 'Territorial Pissings' in 1991 at the Paramount

Nirvana Get Down With 'Breed' in 1991 at the Paramount