Help indentify a couple of documentaries

One followed the lives of a poor “hillbilly” family in Tennessee or Kentucky I cant remember which.

The other takes place in a parking lot before a Judas Priest concert with interviews with all the various fans.

Heavy Metal Parking Lot

Is the other one American Hollow? It was directed by Rory Kennedy about 10 years ago.

Well, here’s a list of possibilities.
Another that’s not on that list might be “Harlan County USA” (1976), about a coal miner strike.

That’s the ones! Thanks Justin_Bailey and BiblioCat.

I saw Harlan County USA a few weeks ago on IFC . That was a frightening situation those folks were in.