Oh, awesome. YouTube user SONICchout has a ton of videos from Sonic Youth's 1986 gig at Mississippi Nights. I'm partial to "Shadow of a Doubt" -- as it's my fave SY song -- but this encore version of "Starpower" (with fIREHOSE -- the post-Minutemen band of Mike Watt) is pretty bitching. Judging from the "Double Helix" credits there, this was broadcast on KDHX's TV station. Can anyone confirm?
"Shadow of a Doubt":