TheSecretNinja337 on YouTube recently uploaded what is possibly the earliest show caught on tape. This footage is from a standing VHS recording camcorder to the left of the stage, capturing the entire band and parts of the crowd. You see Davey dance and sing on the floor like never before. I have personally never seen this particular footage before, so this is very exciting. Davey's attire even matches up to the cover of the "This is Berkeley, Not West Bay".
*In fact, Davey states the record release show near the beginning.