Under Siege (Live in Barcelona) is the first live home video by Brazilianheavy metal band Sepultura, released in 1991. It was recorded during their mid-1991 European Arise tour and prominently features songs from the said album. Interspersed between the songs are interviews with the band members in which they discuss their religious views, how they got together and growing up in Belo Horizonte. The video was later remastered and released as part of Chaos DVD.
The performance of "Orgasmatron" from this video is mixed with backstage footage of the band and crew members, and was shown on TV as a music video to promote the album, but never saw official single release.
The video was released in a card slipcase in both PAL and NTSC territories. The artwork simply shows the band's thorned 'S' logo on a muddy background. Although it appears on many of the band's CDs, this is the first time the logo has been used on cover artwork.