I was reading an interview with a bunch of comedians/writers and they all mentioned this video, Pastor Gas:
https://www.youtube.com/watch?v=dtW5upD5oW4

Apparently everyone had a copy 20 years ago. Marc Maron was saying that Louis CK had it on video, and showed it to him once before putting it away in a drawer and saying 'that's the last time I'll watch it this month, I want it to stay funny'.

Seems there was a whole tape exchange of stuff like this that changed hands around the comedy circuit back in the 90s. It sounds all quaint and geeky.