The complete BLACK FLAG set is available and one of their best. Just a few weeks before they recorded Slip It In.
Lineup: Greg Ginn, Kira Roessler, Bill Stevenson and Henry Rollins.
These last two are, I think, from the same night. The great HAGAR THE WOMB and Devon's CULT MANIAX. The clips were filmed at the Bierkeller in 84, the background looks a little different but both did play at the all-dayer, and spot the BLACK FLAG road cases.
All filmed by Jettisoundz.
The band list from William John Bentham's Jettisoundz diary:
Black Flag / Nighiest / Cult Maniacs / Hagar the Womb / Newtown Neurotics / Bleed / Rattus / Crucified by Christians / Chronic / Stagnant Era / 13 Horses Legs - Bierkeller Leeds
Band list from Shit-fi:
Black Flag, Hagar The Womb, Mau Maus, Newtown Neurotics, Rattus, Cult Maniax, Nig Heist, The Bleed, 13 Horses Legs, Chronic, Crucified By Christians, Stagnant Era, The Abused, Obesa, Genocide Association.