How much of it is actually on The Black Hole?
I’d say all of it and none of it. It’s hosted by Black Hole star Joe Bottoms and uses The Black Hole to branch off into demonstrations of several different types of effects, both practical and VFX (including several snippets of Mike Jittlov’s stuff). It is clearly a promotional piece made to tie in with The Black Hole but not really about The Black Hole. Does that make sense? Runs 46 minutes sans commercials at PAL speed.